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Opencast vs deep coal mines: what's the difference?

UK transition from deep to opencast mining

Deep (AKA underground) coal mines have a long history in the UK dating back some 400 years. On the other hand, opencast coal mines only became common between 1940 and 60, becoming the dominant mining method in the UK as deep coal mining entered rapid decline. Opencast coal mining techniques were largely imported from the USA (Hansard, 1950) together with the heavy machinery they required. In 1942, the UK Government established the Directorate of Opencast Coal Production under the Ministry of Works to exploit coal seams near the surface (National Archives, n.d.) that were too shallow or fragmented for deep-mining techniques (Ritchie & Roser, 2019). The UK Government encouragement of opencast coal mining was partly the result of a need to boost coal production and a wartime shortage of labour to do it (British Geological Survey). Opencast coal mining was cheaper and used less labour - it also did not require the specialised skills that deep coal mines do. Although opencast coal mining was introduced as an emergency wartime measure, it persisted due to its economic viability compared with deep coal mining. Yet, despite this transition from deep to opencast coal mining, as of 2026, deep coal mines have outlived opencast coal mines as the only active mines remaining in the UK - namely, Aberpergwm in South Wales and the relatively small Ayle Colliery in Northumberland.

The Opencast Coal Act 1958 provided the first comprehensive legal framework for the industry, regulating land acquisition and restoration requirements as the practice moved from emergency status to a long-term economic strategy. However, today we see that this legislation and subsequent legislation was not strong enough to secure restoration of the sprawling opencast coal mines.

Mining legacy issues for the climate, public safey, and tax payers

Deep/Underground coal mines

  • METHANE: As the name suggests, mining goes deep underground where there are often higher concentrations of methane that are stored there under the pressure of the rocks and soil above it. Excavation allows that methane to escape (fugitive methane emissions) into our atmosphere. Methane is a potent greenhouse gas. Even after coal mining has finished, deep coal mines can continue leaking methane gas for decades, driving climate chaos and posing dangers to the public of explosion and suffocation near to shafts. Internationally, there is growing awareness of this issue and attempts to monitor and control leakage, but progress is slow. An estimated 40 million tonnes of methane leaked from coal mines in 2024.
  • SURFACE STABILITY: When mining stops so does pumping water out to keep the mines dry. As the water slowly fills the mine from surrounding soil up to the water table, it can -along with time - it can cause the collapse of the pillars left in underground mining to hold up the roof of underground tunnels. This can then create 'sink holes' on the surface, and subsidence for houses built above tunnels. With the location of earlier mining works often undocumented, it is not always possible to assess the risks.
  • WATER POLLUTION: When deep mines close, pumping out the water is stopped and the water levels rebound up to the 'water-table'. As water fills the mining tunnels and shafts, it reacts with minerals like pyrite, creating acidic, iron-rich water which can kill aquatic live if it enters rivers as well as pollute drinking water. At a number of mines around the UK, the Mining Remediation Authority pumps up mine water to clean it, then return it to the mine.
  • UNCOVERED MINE SHAFTS: known as 'adits', these are vertical or near vertical shafts that can go down a long way - originally used with a lift system to lower miners to the right levels to dig horizonal tunnels along coal seams. As records have been lost or were never created for the earlier coal mines, not all the adits are known. This presents a falling danger for walkers or explorers. If you see an uncovered adit, please report it to the Mining Remediation Authority.

Opencast coal mines

  • SOIL DEGRADATION: Unlike deep coal mines, opencast coal mines strip away large areas of vegetation, top soil, sub-soil, rocks, and non-target coal (called 'overburden') to get at the target coal beneath it. UK planning policy now requires mining companies to store these different layers separately and avoid compaction so they can be replaced like a lasagne after coal mining ceases. In reality, though, they are often mixed and compacted, drastically reducing their fertility and the viability of agriculture or nature return for decades. Over 70% of mined land globally suffers from soil degradation.
  • FLOODED VOIDS: Opencast coal mining creates bowl-like voids in the earth with a track spiralling down around the edge of the void for HGVs to access the sides and bottom and carry the 'overburden' and coal out of the void. These voids can be huge. It is a conditional of planning permission for an opencast coal mine that once mining ends, the company refills the void with the 'overburden' they removed, leaving a level surface. However, the coal has been carried away and burned so additional "soil-forming material" would be needed to refill the void completely. This can be expensive, along with moving millions of cubic metres of overburden from where it has been dumped back into the void. This part of restoration alone can cost up to £100 million. As mining has finished by this point, there is no further profit to be made and the incentive for mining companies to evade delivering on their agreement keep that money means a degraded landscape and voids and are more often left behind to slowly flood from ground water and rain. Although these are euphemistically called 'lakes' by mining companies, these unplanned and huge bodies of water represent a flood worry for nearby communites and can be a hazard for swimmers as the water is very deep and cold. Due to the exposed coal face, some water bodies also test for hightened levels of metal pollutants.
  • NOISE AND DUST: As the name indicates, opencast coal mines are open to the air and wind. Where explosive 'blasting' methods are used to expose coal seams, the sound and shockwaves isn't shielded by the surrounding ground as it is in underground mines. Dust from blasting and from HGV movements can be carried significant distances by the wind. Together, these activities can severely impact nearby residents. Where the dust is from the coal, it can also carry heavy metals that pose a health risk, particularly to asthma sufferers.

Both

  • COAL TIPS: often referred to as coal tips for deep mines and overburden mounds for opencast coal mines, they are similar in composition and risks. These tips are where everything is dumped that is between the mining company and the target coal - vegetation, top soil, sub-soil, rocks, and non-target coal. These tips can be colossal in size, and some earlier ones have now settled and revegetated to such a degree that it is unrecognisable as a tip. However, both new and old tips suffer long-term stability risks, particularly as rainfall increases with climate change. The last tragedy to occur from coal tip was the Aberfan disaster of 1966, where coal tip became unstable during heavy rain and slipped down a valley into a school, killing 144 children and teachers. However, since 2020 there have been two near misses, also in South Wales. In wales, there is a new multi-million pound scheme to monitor tips for slippage and carry out stabilisation works if needed, to avoid further slips that could end in tragedy.
Published: 07/05/2026

Welsh parties commit to restoration ahead of elections

We worked with media outlet, Nation.Cymru, to ask where the main political parties in Wales stands on restoration issues ahead of the Welsh election on 07th May 2026. This is a key issue for many people, but particularly those who live near under-restored opencast coal mine sites. These sites need Welsh Government support to bring them more in line with the quality that was promised to local residents. It's also vital that Wales learns lessons from its scarred landscape. We hope that these political parties remember these pre-election commitments when it comes to determine the called-in Ffos-y-fran ex-opencast restoration planning application. Reform was the only party not to respond - but this is a summary of what the other political parties of Wales had to say:

(see the Nation.Cymru article for the full account)

Plaid Cymru

  • Industry Accountability: Strengthening "polluter pays" laws to ensure companies that profited from heavy industry are legally responsible for land restoration.

  • National Remediation: Implementing a nationwide strategy to monitor and restore every coal tip, while demanding Westminster fund the clean-up of pre-devolution hazards.

  • Community Planning: Reforming land-use planning to balance development with nature restoration and better public access to green spaces.

Wales Green Party

  • Justice First: Mandating that polluters pay for all prevention and repair, ensuring environmental damage is never subsidized by the public.

  • Ecological Regeneration: Focusing on long-term ecological repair of mining sites rather than short-term safety fixes to deliver environmental justice.

  • Fundamental Access: Treating high-quality nature access as a fundamental right, prioritizing new green spaces in communities historically affected by industry.

Welsh Labour

  • Pollution Reform: Introducing a new Clean Water Bill and a dedicated watchdog to crack down on water pollution.

  • Tip Safety: Establishing a "Disused Tips Authority" in Merthyr Tydfil to secure 400+ sites and exploring solar energy or mine-water heating on reclaimed land.

  • Green Renewal: Expanding on the 4,000+ green spaces already created by launching an urban rewilding taskforce.

Welsh Liberal Democrats

  • Aggressive Enforcement: Taking tough action on sewage and industrial dumping, ensuring big companies—not local taxpayers—foot the bill for clean-ups.

  • Green Opportunity: Moving past "empty nostalgia" by transforming former coal sites into hubs for green industry, housing, and skilled work.

  • Land Reclamation: Partnering with councils to turn derelict land into parks, tree-filled areas, and safe walking or cycling routes.

Welsh Conservatives

  • New Oversight: Scrapping Natural Resources Wales and replacing it with a new independent regulator to enforce environmental rules.

  • Conservation Funding: Establishing a £20m "Wildlife Wales Fund" to support conservation efforts and community green spaces.

  • Economic Focus: Prioritizing economic transformation in coalfield areas while protecting heritage and improving site safety.

Published: 01.05.2026

Mining company sells out local communities to keep record profits

Merthyr (South Wales) Ltd illegally mined coal at Ffos-y-fran for over a year, profiting from record coal prices. Now, it wants to keep all the profits by trying to downgrade the restoration plan, breaking its promise to the 60,000 residents of Merthyr Tydfil, South Wales.

Take action by 02/04/2026!

Your objection means much more if it's put in your own words why you want Merthyr Tydfil Council to refuse the application to downgrade this huge restoration project. Here's some points you might choose to include, or go straight to the objection form:

  1. Residents deserve not to worry about a million cubic metres of polluted mine water above them, with just a road between that and them.
  2. Residents deserve not to worry about 37 million cubic metres of colliery spoil across the 3 coal tips less than 3 miles from the 1966 Aberfan disaster.
  3. Residents deserve not to worry about their kids playing near a sheer cliff edge with 100m drop into a flooded mine.
  4. Residents deserve to receive the quality of restoration promised to them.
  5. Commoners deserve to have their rights and grazing land restored to them in full.
  6. The State of Nature Wales 2023 report outlined a nature emergency in Wales - we cannot afford this downgrade.

This will take you to the Merthyr Tydfil Council's short objection form.

Published: 28/02/2025  |  Updated: 09/01/2026

Barristers tackle tip law & licensing

Fresh legal advice suggests licence is required for coal tip mining

Coal Action Network has obtained new legal advice from expert Barristers Estelle Dehon (KC) and Rowan Clapp of Cornerstone Chambers, London. Examining relevant legislation from 1990s, the Barristers argues that mining coal previously discarded in coal tips require a licence from the UK’s Mining Remediation Authority (national regulator). This backs up previous legal advice we’ve received from Barrister Toby Fisher of Matrix Chambers, London.

Currently deep and opencast coal mines require a licence from the national regulator, in addition to planning permission. The national regulator recently refused a licence for the West Cumbria coal mine, preventing the project from starting. But the national regulator and DESNZ both deny that legislation means mining coal tips requires a licence.

The Coal Industry Act 1994

Section 25 (1) states “coal-mining operations” shall not “be carried on by any person except under and in accordance with a licence”. In plain speak, this means a ‘coal mining operation’ needs a licence. So how is a coal mining operation defined?

Section 25 (2) defines ‘Coal mining operations’ as the “winning, working and getting” of coal. It’s only relevant if it’s in the UK and if it’s not just to move coal out of the way to do something else, like build foundations for a house.

The legislation includes within ‘Coal mining operations’ things like dumping soil that was removed during coal mining, even if this happens later and outside of the mine. If the act of making a coal tip is included, then mining that coal tip should be included too.

Mining coal tips for previously discarded coal within them is clearly ‘getting’ coal, putting it within the legal definition of Coal mining operations’. For that matter, mining coal tips also fits within case-law definitions of “winning and working”. The Welsh Government’s Minerals technical advice note (MTAN2) also backs this up, defining ‘coal working’ as including the “recovery of coal from tips”.

Town and Country Planning Act 1990

Section 336 of the 1990 Act defines a ‘mineral working deposit’ to mean "any deposit of material remaining after minerals have been extracted from land or otherwise deriving from the carrying out of operations for the winning and working of minerals in, on or under land" – which easily encompasses coal tips.

Section 55 (4) (a) (i) defines a ‘mining operation’ as the “removal of material […] from a mineral-working deposit.”. As coal tips amount to a mineral-working deposit, it follows that mining coal tips amounts to ‘mining operation’. The 1990 Act requires any mining operation to get planning permission – accordingly, mining coal tips requires planning permission under this definition, which has been accepted since the Act was introduced.

This planning law is aligned with Barristers’ Estelle Dehon’s (KC), Rowan Clapp’s, and Toby Fisher’s interpretation of the The Coal Industry Act 1994, which came 4 years later.

MRA (regulator) and DESNZ (UK Government department) perspectives:

The Mining Remediation Authority (MRA) has stated that it does not consider coal tip extraction to be a ‘coal mining operation’ because it claims that coal tip extraction does not meet any of the requirements listed within the s.65(1) of the 1994 Act definition of a ‘coal mining operation’ or a ‘coal mine’. As a result, the MRA states that it has no power to licence or not licence mining a coal tip. And DESNZ adds that it does not plan to make any changes so that coal tip mining projects would require a licence from the MRA in future (based on the understanding it is not currently required, which is against our Barristers’ understanding).

Where does this leave us?

This boils down to a difference in interpreting some heavyweight law that’s over 30 years old. Some of the argument hinges on whether you read a sentence such as “to be a thing, it must include the following: X, Y, ‘and’ Z” to mean it needs to be all of X,Y,Z to be the thing, or it’s enough for it just to be Y, for example. The only way to settle the argument is a costly court case with our Barristers on one side and UK Government Barristers on the other side – and the UK Government has much deeper pockets than us.

Why it matters so much now

The civil servants within the UK Government are right now busy cooking up new legislation to ban the MRA from issuing any new licences for coal mining – which is great news because all coal mining needs a licence…so that means no new coal mining projects (existing licences can still be used). The problem is that it won’t ban mining coal tips, because of the MRA’s belief that this doesn’t require a licence in the first place. That means, once this new legislation passes, the only place coal can be mined in the UK is coal tips – which will still be fair game, undermining the intention of the coal ban to stop coal mining.

This is a particularly absurd situation as mining previously discarded coal from coal tips or mining new coal from opencast coal mines involves the same processes – moving large volumes of soil around with HGVs, separating spoil from saleable coal, transporting that coal etc. and generating the same local environmental and community impacts such as noise, dust, and disruption. It will also have the same climate change effects when burned. Mining coal tips is an industry that dates back until at least the 1980s. With over 5,000 coal tips around the UK and a live proposal to mine two coal tips in South Wales of over 400,000 tonnes of coal, we begin to understand why it matters whether coal tips are included within the new legislation to ban coal mining.

What’s next

PLAN A
The easiest option would be for the civil servants beavering away at the new coal ban legislation to simply include an amendment requiring coal tips to need a licence (via clarification or change to existing legislation). This would bring coal tip mining, opencast mining, and deep mining all within the same requirement for a licence – which the new legislation would then ban in one swoop. Find out more about the simple legal wording our Barristers have suggested including to do this.

PLAN B
If Ministers and civil servants refuse to explicitly include coal tips within the new legislation, we are going to have to consider a legal challenge to the UK Government’s belief that mining coal tip doesn’t need a licence. If we win that, then mining coal tips would be banned within the new legislation by default. We hope you’ll support our fundraising efforts if we are forced to do that.

18/08/2025

Cross-party support at Senedd drop-in session to act on coal legacy

Strong cross-party engagement

On July 1st, 2025, CAN organised an impactful drop-in session at the Senedd to reinforce the urgent need for action on Wales' coal legacy issues. The event, sponsored by Delyth Jewell MS, saw strong cross-party engagement, with Members of the Senedd (MSs) from Labour, Plaid Cymru, the Conservatives, and the Liberal Democrats in attendance.

Framed as a call to action on two interconnected issues—the future of coal tips and the restoration of the Ffos-y-fran opencast site—the session demonstrated growing momentum for change across the political spectrum.

Coal tips: backing a better Bill

CAN supported Delyth Jewell’s proposed amendment to the Disused Mine and Quarry Tips (Wales) Bill, which would rule out the sale of coal from disposed land for the purpose of burning. This simple but powerful clause would ensure that coal removed during the management of old coal tips cannot be fed back into fossil fuel supply chains—closing a loophole that could otherwise undermine climate commitments.

We also spoke with MSs to urge the Welsh Government to work constructively with the Department for Energy Security and Net Zero (DESNZ) in Westminster to ensure the UK-wide coal mine ban currently under development includes coal extraction from coal tips. As it stands, tip-extracted coal is not covered—a glaring omission that risks opening the door to a new phase of coal exploitation under the guise of legacy management.

Ffos-y-fran: getting it restored

Merthyr (South Wales) Ltd, which operated the Ffos-y-fran coal mine, is seeking to drastically reduce its contracted restoration obligations by up to £110 million. This is despite public filings showing £91.2 million already allocated for the site's restoration by the mining company. MSs attending our drop in session spoke with local residents we invited, viewed our gallery images of the coal mine site, and explored it for themselves via our 360 drone photos.

This raises serious concerns about transparency and risk—particularly given the site's proximity to local communities and the significant safety and environmental hazards involved. See our brief to find out what actions MSs can take today to deliver justice for Merthyr Tydfil.

Building political will

Attendance at the drop in session by every Senedd party shows there is political appetite for action. Members across party lines recognised the urgency and legitimacy of the issues we raised. This is not about party politics—it’s about public safety, environmental justice, and the integrity of our climate commitments.

We thank every MS who took time to attend, engage with our materials, and listen to affected communities. We will continue to campaign so that Wales does not repeat the mistakes of its past but instead leads the way in managing its coal legacy responsibly.

Published: 09. 07. 2025

Westminster: our evidence on Wales' coal legacy

Westminster’s Welsh Affairs Committee

Coal Action Network was invited to attend Westminster where we gave evidence to the Welsh Affairs Committee in their inquiry about the environmental and economic legacy of Wales’ industrial past, alongside Friends of the Earth Cymru.

This inquiry was opened in December 2024 to examine the environmental legacy and economic impact of Wales’ historical heavy industries. You can find our written evidence here.

Summary of our submission

In our submission, we focused on the consequences today of old coal mines. Whilst we recognise the wealth it generated, much of that was kept by the Directors of mining companies whilst abandoning their restoration responsibilities to host communities. Our 2022 report ‘Coal mine restoration in South Wales’ documents this pattern in Wales’ recent past. We also highlighted the threat of new coal mining under the guise of remediation, as proposed in Bedwas, South Wales.

Our oral evidence

  1. We explained that the cycle of mining companies letting down their host communities is not just a legacy issue, but is also a live issue. We commented on how perverse it would be to rely on profit-driven mining companies to fix the problems caused by those same profit-driven mining companies.
  2. We highlighted that not all coal tips should be flattened – with unique and rare ecologies growing up around some of the older coal tips. Many coal tips are also stable and safe now.
  3. We called for the UK Government’s coal ban to include ‘remining’ coal tips – as this shares many of the same characteristics as conventional coal mining.
  4. We also recommended that the UK Government deliver more dedicated funding on an ongoing basis to the Welsh Government to monitor and remediate historic coal mining sites and tips.
Published 07.04.2025

Lethal landscape: cuts to Ffos-y-fran mine restoration puts community at risk

A new plan to cut every corner

Merthyr (South Wales) Ltd operates the recently closed sprawling Ffos-y-fran opencast coal mine, next to the town of Merthyr Tydfil - home to around 58,000 people. In 2015, Merthyr (South Wales) Ltd agreed a restoration plan with Merthyr Tydfil Council, which - after coal mining ended - would see the landscape put back to before coal mining began and with extensive habitat improvement to support nature to return to the area. But as soon as Merthyr (South Wales) Ltd saw there was no more profit to be made, it claimed that it had failed to set aside enough of its profits to fund the restoration plan it agreed to deliver back in 2015. Rather than taking Merthyr (South Wales) Ltd to court over what would be a breach of contract and trust, Merthyr Tydfil Council invited the company to gut that restoration agreement by around £85 million in works, and with no punitive action against the company. This is despite all public records indicating Merthyr (South Wales) Ltd actually can afford the original restoration plan.

We've been here before...

Within the last decade, Celtic Energy Ltd - another mining company, evaded well over £100 million in restoration costs and made a high quality restoration impossible at 4 opencast coal mines across South Wales. Communities living close to these sub-standard restorations still pay the price for Celtic Energy Ltd's profiteering. In fact, the Welsh landscape is littered with over 2,500 coal tips - abandoned by coal mining operations and now forming a huge burden estimated to cost £600 million to deal with.

Merthyr (South Wales) Ltd's attempt to evade the cost of the restoration it agreed to at Ffos-y-fran is therefore just the most recent instance of an industry that continues to cost some of the poorest communities in South Wales more than it ever gave them. But all is not lost for the 58,000 residents of nearby Merthyr Tydfil. We're standing alongside vocal campaigners in the area against this attempt by Merthyr (South Wales) Ltd to short-change the town of Merthyr Tydfil by £91.2 million in restoration funds. You can help us by taking 2 min to object to this application on the local council's website.

We're back in the Senedd giving oral evidence

Oral evidence the for Disused Mine and Quarry Tips (Wales) Bill

We were invited for the second time to give oral evidence to the Climate Change, Environment, and Infrastructure Committee of the Welsh Parliament (Senedd) on 05th February 2025. We shared the panel with Haf, Director of FOE Cymru, to provide our opinion on the weaknesses, strengths, and improvements that need to happen for the Disused Mine and Quarry Tips (Wales) Bill to deliver real benefits for Welsh people living in the shadow of coal tips.

The big risk

We emphasised that the The Disused Mine and Quarry Tips (Wales) Bill, in its current form, carries the very real risk that it could encourage 'remining' so-called waste coal from coal tips under the guise of making those coal tips safe. There is a live proposal to do exactly this for two coal tips in Bedwas, Caerphilly. Read more about coal tip re-mining and safety.

Our message to the Senedd Committee: include a provision in this new Bill prohibiting coal extraction for commercial gain from disused coal tips.

Watch now

Watch our session with the Committee to find out how the pros and cons of the new Bill, not least encouraging 'remining' coal tips which contain up to 643 million tonnes of coal, emitting up to 1.7 BILLION tonnes of CO2.

Last time we gave oral evidence in the Senedd...

In April 2024, we were invited to give oral evidence on Welsh coal mine restoration, with a focus on Ffos-y-fran opencast coal mine. Check out this video of our debut session with the Climate Change, Environment, and Infrastructure Committee.

We investigate mining company's 'missing' millions

Background

Mining company: Merthyr (South Wales) Ltd (MSW) is the current operator of the sprawling opencast coal mine, Ffos-y-fran, in Merthyr Tydfil, South Wales.

Claim: MSW claims "It was established that there are insufficient funds available to achieve the 2015 restoration strategy and therefore an alternative scheme is required." (EIA Scoping Report, July 2024). It is on this basis that a new application will be considered by Merthyr Tydfil County Borough Council. This claim is disputed by independent forensic account.

MSW's 'solution': To downgrade the restoration scheme promised to surrounding communities to one that amounts to doing as little as possible. Even returning the tens of millions of cubic metres of coal tips to fill in the gaping void the company created and allowed to flood is considered "not feasible or economic" (EIA Scoping Report, July 2024). If this downgrade is agreed to by the Council, MSW is off the hook for the original restoration cost. An independent forensic accountant reports this is the easiest ploy for MSW to evade up to £105 million in restoration costs.

Why MSW is offering to do any works: Merthyr Tydfil County Borough Council holds £15 million in an Escrow account that it forced MSW to pay into (by court order after MSW refused to!). This was never intended to fund the original restoration agreement costed at £75-120 million, but that is what's happening now as MSW is claiming the company doesn't have the finances to pay for the restoration it previously agreed to fund. MSW wants this £15 million so is proposing a massively downgraded restoration plan and presenting this as the only option so the Council will pay this out to them. The Council is afraid the company will walk away if it is compelled to honour its contractual agreement to fund the restoration itself. If that happens, the Council would have to pay a new company to come in to restore the site, which'd cost more.

Our recommendation: Merthyr Tydfil County Borough Council has refused to pursue MSW to deliver on the contractually agreed level of restoration, and is poised to consider a downgraded plan by MSW which would affect surrounding communities living in Merthyr Tydfil for generations. Haven't they put up with enough after 16 years of coal mining, dust, and noise pollution? The Welsh Government urgently needs to launch an inquiry MSW finances and the Council's actions, issuing a 'holding directive' to prevent the Council approving the downgraded plan in the meantime.

No evidence of limited finances

To our knowledge, there has been no evidence submitted by MSW that it cannot fund the full restoration it is contracted to undertake. On the contrary, MSW's most recent, publicly available, financial statement on Companies House says "during the year the directors again reassessed the restoration provision based on current operating costs in particular diesel prices which have decreased significantly and increased plant hire costs, which as a result increased the restoration provision by £0.2m to £91.2m",  by 31 Dec 2023, admitting record profits the year before, with its ultimate parent company, Gwent Holdings Ltd, reporting "The average coal price achieved increased by 94% to £151.66 per tonne" in its 2022 filing. This funding for restoration was based on Ffos-y-fran closing at the end of its planning permission in September 2022 - but it continued illegally mining coal for over a year after that, and even outside its licenced area, selling an extra 640,000 tonnes of coal - driving profits even further.

It's been claiming tax discounts to HMRC each year by phasing expected restoration costs that it now refuses to pay. This report goes on to say "The total costs of reinstatement of soil excavation and of surface restoration are recognised as a provision at site commissioning when the obligation arises. The amount provided represents the present value of the expected costs.".

This very much sounds like the company able and prepared to pay the restoration costs, and had already claimed tax discounts for it. So why is the company being allowed to duck tens of millions in what it owes?

Companies involved

As is typical of the mining industry, operations and financing is done through a complicated constellation of interconnected companies owned by family members (depictions of which are illustrative only and not based on any likeness). This kind of practice could help evade liabilities - though we're not suggesting that was the intention here. The following information is accurate to the best of our knowledge, please refer to Companies House for confirmation/further details:

  • Merthyr (South Wales) Ltd
    • Company number 04261274
    • David Stanley Lewis - Director and shareholder
    • Jayne Helen Lewis and Andrew John Lewis - Ex-Directors
    • Named operator of Ffos-y-fran
  • MERTHYR (NOMINEE NO.1) LIMITED
    • Company number 04261269
    • David Stanley Lewis - Director as of August 2024
    • Jayne Helen Lewis and Andrew John Lewis - Ex-Directors
    • Dormant company subsidiary of Merthyr (South Wales) Ltd
  • Ffos-y-fran (commoners) Limited
    • Company number 04892620
    • Jayne Helen Lewis – Director
    • Andrew John Lewis - Ex-Director
    • Dormant company subsidiary of Merthyr (South Wales) Ltd
  • Merthyr (Ffos-y-fran) Limited
    • Company number 06353565
    • David Stanley Lewis – Director
    • Jayne Helen Lewis and Andrew John Lewis - Ex-Directors
    • Dormant company subsidiary of Merthyr Holdings Limited
  • Merthyr Holdings Limited
    • Company number 06330412
    • David Stanley Lewis – Director
    • Jayne Helen Lewis and Andrew John Lewis - Ex-Directors
    • Subsidiary of Gwent Investments Limited
    • Holding company
  • Gwent Investments Limited
    • Company number 08936878
    • David Stanley Lewis - Director
    • Jayne Helen Lewis and Andrew John Lewis - Ex-Directors
    • Investment company
  • Gwent Holdings Limited
    • Company number 10119615
    • Jayne Helen Lewis and Andrew John Lewis – Directors
    • Ultimate parent company of Merthyr (South Wales) Ltd

Individuals involved

David Stanley Lewis

Jayne Helen Lewis

Andrew John Lewis

David Lewis has already been convicted of criminal fraud, with Judge Durham-Hall telling Lewis: "When the truth was put before you you wriggled, twisted and whinged" and described Lewis as "a pathological gambler who demonstrated pathological dishonesty", concluding "What he did was unlawful, crass, stupid and dishonest." *we believe this article refers to the same David Lewis that is currently Director of MSW but will consider evidence to the contrary, so get in touch before you threaten to sue us again David 😉

Corporate structure

Published 06.02.2025

Disused Mine and Quarry Tips (Wales) Bill

Summary

The Disused Mine and Quarry Tips (Wales) Bill (‘the Bill’) was prompted by a series of coal tip landslides that occurred in Wales following storms’ Ciara and Dennis in 2020, including a major landslide of a disused coal tip in Tylorstown. The Bill seeks to update the Mines and Quarries (Tips) Act 1969, to more effectively manage the 2,573 coal tips and over 20,000 non-coal tips within Wales so they do not threaten human welfare, by reason of their instability. To drive this management framework, the Bill proposes to create a new public body – the Disused Tips Authority for Wales (‘the Authority’), which would assess, register, monitor and manage disused tips.

Our recommendations

  1. The Bill should include a provision prohibiting coal extraction for commercial gain from disused coal tips to prevent the unintended potential for the Bill to encourage an industry oriented towards ‘re-mining’ disused coal tips under the guise of preventing future instability,
  2. The Bill should be accompanied by a full Climate Change Impact Assessment and Carbon Impact Assessment, given the potential of the Bill in its current form to encourage applications for coal tip ‘re-mining’.
  3. It is vital that the design and execution of stability works on coal tips prioritise minimising potential impacts on the wellbeing of typically socio-economically disadvantaged communities – for example in operating hours, HGV movements, flora clearance, restriction of public access to green spaces etc.

Legislative aim

To prevent disused tips from threatening human welfare through instability. The aim is for the Bill to be preventative and proactive rather than reactive. The first section of the Integrated Impact Assessment discusses the need to anticipate impacts of climate change on tip stability, such as the trend of increasing rainfall and storms. It seeks to do this by:

  1. monitoring registered disused tips, with inspections increasing in frequency relative to their risk levels.
  2. maintaining tips to promote stability.

The Authority

  • Set up as a ‘body corporate’ (a form of company with its own distinct legal entity, and could be any of five possible types of company)
  • Activities: oversees the assessment, registration, monitoring, and oversight of disused tips
  • Scope: human welfare put at risk due to tip instability or threats to tip stability
  • Powers includes:
    • to require a landowner to make tips stable or prevent tip instability
    • for the Authority to make tips safe
    • obtain (via a contribution order) and make payments (in compensation) relating to coal tip stability and instability issues or events
    • entry to land to undertake its activities
    • requiring and sharing information
  • Enforcement: the Bill creates related offences to make the regime enforceable

Tip categorisation changes

The current categories of R,A,B,C, and D would be replaced by a simpler two-step assessment process. The first step would be a desk-based risk assessment, the results of which may recommend a subsequent full assessment.

Additional to the Mines and Quarries (Tips) Act 1969

Key changes introduced by the Bill include:

  • Creates a distinct Authority
  • Lowers the threshold to intervene in coal tip stability
  • General duty to ensure the safety of coal tips
  • Power to require tip owners to carry out preventative maintenance to prevent a tip becoming a danger
  • Allows local authorities to carry out tip works

Our analysis

Context 1
The Integrated Impact Assessment claims the Bill does not deal with coal tip remediation, and does not increase the likelihood of movement and potential combustion of coal that can accompany coal tip remediation. The Assessment goes further to state that the Bill’s preventative action will reduce the need for coal tip remediation and works required after coal tip slips. Coal Action Network believes these claims to be sincere but inaccurate.

Coal tip remediation involving coal removal and earthworks is presented as a solution to permanently prevent future coal tip instability. It does not substantively differ from other actions such as irrigation to prevent instability.

The UK Government’s proposed coal licencing ban wouldn’t currently prevent ‘re-mining’ coal tips. Additionally the patchwork of laws and policies in Wales is failing to prevent mining companies extracting coal or bringing new applications for coal mining and extensions in the past few years, with Local Planning Authorities shouldering the burden. This Bill may inadvertently increase pressure on resource-strapped Local Planning Authorities by fuelling a new wave of coal extraction applications, such as the current proposal by ERI Ltd to ‘re-mine’ two coal tips in Bedwas in a practice that dates back to at least 1984.

ERI Ltd is a private company offering to permanently remove tip stability risks at no charge to the landowner (Caerphilly Council) in return for selling the extracted ‘waste coal’, which we believe would be an attractive prospect to other landowners facing coal tip liabilities under the new Bill too.

Our recommendation 1
To prevent the unintended potential for the Bill to encourage an industry oriented towards ‘re-mining’ disused coal tips under the guise of preventing future instability, we recommend that the Bill includes a provision prohibiting coal extraction for commercial gain from disused coal tips.

Context 2
In our context to recommendation 1, we outline how – in practice – the Bill may fuel an industry oriented towards ‘re-mining’ coal tips. As a result, the decision to exclude a full Climate Change Impact Assessment and Carbon Impact Assessment from the Bill’s Integrated Impact Assessment should be reversed.

Our recommendation 2
The Bill should be accompanied by a full Climate Change Impact Assessment and Carbon Impact Assessment, given the potential of the Bill in its current form to encourage applications for coal tip ‘re-mining’.

Context 3
Over 85% of disused coal tips (and 90% of coal tips with higher stability risks) in Wales are located in the South Wales valleys, and – according to the Welsh Indices of Multiple Deprivation – are based in communities classed as amongst the 10% most deprived in Wales. As the Government’s Integrated Impact Assessment outlines, preventing coal tip slips would benefit lives, land, and housing in these areas.

Our recommendation 3
To realise this benefit, it is vital that the design and execution of stability works on coal tips prioritise minimising potential impacts on the wellbeing of these socio-economically disadvantaged communities – for example in operating hours, HGV movements, flora clearance, restriction of public access to green spaces etc.