Westminster should "share responsibility" for managing Wales' coal tip sites and provide at least £500million to keep them safe, the Welsh Government has claimed.

Chancellor Rishi Sunak should use his autumn spending review to commit long-term funding to the work over the next 10-15 years, Wales' finance minister Rebecca Evans claimed today.

She said climate change would lead to more frequent spells of extreme weather, meaning Westminster has "a legal and moral responsibility to work with the Welsh Government to address this issue and fund these long-term costs".

Several recent landslips in the South Wales coalfield area proved the matter was of immediate concern, Evans told reporters at a press conference this afternoon.

Around 40 per cent of the UK's coal tips – large mounds of soil and waste products removed from the ground when mining  – are in Wales, and around one in seven of these are categorised as being at high-risk of future landslips.

The Senedd is due to debate coal tip safety this afternoon.

Ahead of that debate, the Welsh Conservatives have questioned why Welsh ministers are appealing to Westminster for £500-600million when "the management of coal tips in Wales is a devolved responsibility".

A spokesperson for the Welsh Tories said: "Labour ministers have had ample opportunities to protect people and communities by making these coal tips safe. But as ever with Labour, they chose not to act, as it’s easier for them to blame someone else."

The Conservatives have argued that Wales should use a "huge dividend" of funding under the devolution settlement to pay for the securing of the nation's coal tips.

But Evans said Wales was "disproportionately affected by the legacy of coal mining" – and while the matter may now be devolved, no Welsh Government existed to reap the benefits of the industry during its heyday.

She said the UK government should show "genuine collaboration" with Welsh ministers on the issue, and said the upcoming spending review was "the chance to find that common ground and to leave a positive, fairer and lasting legacy for former mining areas in Wales".

If you value The National's journalism, help grow our team of reporters by becoming a subscriber.