SCOTTISH Tory threats to vote down the Brexit bill, after Theresa May sold out Scotland’s fishermen, have sunk without a trace.

The party’s MPs will fall back into line and vote for the EU Withdrawal Bill when it comes to the Commons.

Scotland’s fishermen had been promised the UK would be out of the common fisheries policy (CFP) on Brexit day in March 2019.

But last week May backed a transition deal with the EU that effectively keeps the UK in the CFP until the end of 2020.

Just five days ago Gordon MP Colin Clark was one of 13 MPs to sign a letter to the Prime Minister demanding she reject that offer.

The MPs said the plans were “completely unacceptable” and “would be rejected by the House of Commons”.

Yesterday, however, Clark said the plans were in fact completely acceptable and he’d be happy to vote for them.

“Our position is clear,” Clark insisted yesterday during an interview with the BBC’s Sunday Politics Scotland. “We wanted to come out in March 2019 but we’ve accepted – what the Scottish Fishermen’s Federation has accepted – that it’s 21 months, but we are clear we will deliver Brexit and we will come out of the CFP.“

Asked again if he would definitely back the government bill, he replied: “If it is in the EU Withdrawal Bill, which it is going to be, that we will have sovereignty of our waters from 2020, obviously that’s what we have set out and that is what we are going to achieve.”

SNP MSP Gillian Martin, who shares a constituency with Clark, was scathing.

“The Scottish Tories are breaking new promises on fishing every day,” she said.

“First, they promised that we would regain full control over our waters on March 29 2019, and that promise has been scrapped. Then they claimed they would vote against the EU Withdrawal Bill unless the UK Government confirmed that fishing rights would not be traded post-transition.

“And now Colin Clark MP has claimed that he will give his full backing to the Brexit bill, despite not having any of those guarantees from the UK Government. Neither he nor his north-east Tory colleagues are even attempting to stand up for the voters who put their trust in them.”

Meanwhile, Labour will try to rewrite the government’s Brexit legislation to prevent the UK leaving the European Union without a deal if parliament rejects any agreement May strikes with Brussels.

The only vote MPs are going to be given is effectively a take-it-or-leave-it choice; either they accept whatever trade deal is agreed, or they back crashing out in a hard Brexit.

In a speech today, shadow Brexit secretary Keir Starmer will say MPs need to have more control.

“If Parliament rejects the Prime Minister’s deal, that cannot give licence to her – or the extreme Brexiteers in her party – to allow the UK to crash out without an agreement.

“That would be the worst of all possible worlds. That is why in the coming days – and working with others in the Lords and the Commons – Labour will ensure that an amendment is tabled to the EU Withdrawal Bill to strengthen the terms of parliament’s meaningful vote.

Labour’s position on Brexit has come under scrutiny following Owen Smith’s dismissal from the shadow cabinet after calling for a second referendum.