DAVID Mundell must deliver on his pledge to protect the Scottish Parliament's powers or "consider his position".

The SNP made the call as they accused the Scotland Secretary of making promises "he couldn't keep" over powers returning to Holyrood after Brexit.

READ MORE: Project Fear is back: 'The Tories think they can do anything to Scotland'

Speaking in the House of Commons earlier this week, Mundell said: "I have set out clearly that, in the process of leaving the EU, I want to ensure that the Scottish Parliament has more powers and responsibilities than it does today.

"I also want to ensure that we have an arrangement in place to allow us to agree frameworks as we move forward, and that frameworks, as I have previously said, should not be imposed."

It comes as the UK Government published the full details of its power grab on Scotland, setting out the policy areas currently handled by Holyrood that it wants control of post-Brexit.

READ MORE: Tory ministers tell Scotland what powers they want to grab

The UK's Brexit Bill would see all powers return to Westminster, with only some then passed on to devolved parliaments.

The dispute over which powers will return to Scotland has resulted in an imminent constitutional crisis, with the Scottish Government refusing to give its consent to the Tory Bill.

The SNP have now said that if the UK Government’s amendment does not give the Scottish Parliament the right to consent to any changes to its powers, then the Scottish Secretary must stick to his position, or step down.

The SNP’s Westminster leader, Ian Blackford MP, also criticised David Mundell’s “deafening silence” on the UK government’s leaked Brexit papers showing the huge damage a no-deal exit could do to Scotland.

Blackford said: “David Mundell must either deliver on his pledge to fully protect the powers of the Scottish Parliament or consider his position. For Mundell to be right, the UK Government must agree to the Scottish Government's position on Brexit.

“The Scottish Secretary is supposed to be Scotland’s man in London but whenever the UK Government takes a major decision, he’s not invited to the table – and whenever the UK Government makes a decision that goes against Scotland’s interests, he goes into hiding rather than doing his job of challenging it.

“We saw it over the UK Government’s damning Brexit analysis, which David Mundell previously claimed didn’t exist, and when the UK Government failed to bring forward amendments to the Brexit Bill to protect Scottish devolution, despite all their promises.

“And we saw it again last week, when Mundell wasn’t even invited to Chequers where the Tory Cabinet were busy deciding their Brexit plan for the UK – leaving Scotland with no voice at the table.

"Mundell's latest blunder shows he can't be trusted when it comes to getting the best deal for Scotland when the UK leaves the EU.

“As the Scottish Tories are increasingly sidelined, they are letting us all down by failing to lift a finger to protect our national interests. Once again it falls to the SNP to stand up for Scotland."