SCOTTISH Tory MP Ross Thomson has broken ranks with party colleagues and attacked the Prime Minister’s new Brexit negotiating stance.

Thomson, who represents Aberdeen South, was among Tory MPs invited to Downing Street for a briefing on the plan agreed by almost all members of Cabinet in Chequers on Friday.

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The meeting came hours after Brexit Secretary David Davis quit government over the position, arguing that it was “certainly not returning control of our laws in any real sense".

He told Theresa May her negotiating approach would likely “lead to further demands for concessions" from the EU.

Thomson, who has signed up to the Brexiteer European Research Group, agreed.

“I’ve been deeply concerned by the #ChequersPlan but reserved judgement until I could see detail,” he tweeted.

“I’ve just left the Downing Street briefing and I still have concerns. The #Brexit plan opening offer appears so diluted that we would be a vassal state. I now await the White Paper.”

Aberdeen SNP MSP Kevin Stewart said Thomson was failing the city: “Ross again completely ignoring his constituents, a huge majority of whom voted to remain in the EU.

"Is he telling us that he'll be sending a letter to the 1922 committee to trigger a challenge to depose May? He should be careful of what he wishes for if that leads to an election!”