IF the Scottish Tories care about saving the union they must vote against Theresa May’s Brexit Bill today, Labour has said.

The party have turned on their old Better Together allies, saying that Scottish Tory MPs need to rebel against the Government if they “believe Scotland’s interests lie within the United Kingdom”.

The comments from shadow secretary of state Lesley Laird come ahead of a House of Commons debate this afternoon on the EU (Withdrawal) Bill and how it will impact on devolution.

The Scottish and Welsh governments have already called the legislation a “power grab”, with Clause 11 seeing powers repatriated from Brussels going straight to Westminster rather than coming immediately to Holyrood.

If just seven of the 13 Scottish Tory MPs vote against the Prime Minister, it will be enough to scupper her notional majority.

Laird, along with shadow Brexit secretary Keir Starmer, called on the Tory MPs from north of the Border to back their amendments to the Bill.

Laird said: “Those of us who believe Scotland’s interests lie within the United Kingdom must ensure powers which belong in Edinburgh after Brexit are returned there without delay.

“Scottish Tories must now make good on their rhetoric and stop this Westminster power grab.”

Starmer added: “After the election, Ruth Davidson promised the Scottish Tories would make their case ‘forcefully’ in Westminster.

“If that is the case then she should be telling her MPs to back Labour’s amendments to help protect the devolution settlement and ensure the Government does not have a legislative blank cheque.”

Ian Blackford, the SNP leader at Westminster, also called on the Tories to vote for their amendment to the Bill if they were “serious about protecting the Scottish Parliament”.

He said: “The Scottish Government reiterated the importance of the devolved administrations being fully involved in the Brexit negotiations.

“Good progress has been made in several areas, most specifically on the issue of UK frameworks. However this Bill does not go far enough.

“Clause 11 so fatally undermines the devolved settlements across the UK, both the Welsh and Scottish Governments have worked together in tabling amendments to the Bill.

“It’s clear to the legal profession and experts that Clause 11 has been drafted without proper understanding of devolution law. This undoubtedly raises questions about the mechanisms used in Clause 11.”

Scottish Tory MP Paul Masterton said: “There is clearly a deal to be done on the return of powers that respects devolution and protects the UK internal market.

“The Scottish Conservatives want to see the UK and Scottish governments work together on this so we can get the best Brexit deal for Scotland.

“Instead of carping from the sidelines the Labour party should join us in these efforts.”

Meanwhile, Scottish Brexit minister Mike Russell has insisted the Bill is not yet in a place where it can be given the consent of the Scottish Parliament.

Russell said that if the Bill is not amended properly in the Commons today, “there cannot be the progress that the UK Government wants”.

He said that unless the Bill was amended it would “undermine devolution and cause great damage to Scotland, and to Wales and Northern Ireland”.

However, he added that even if the amendments they are backing passed, it would not guarantee SNP support for the Bill.