DOMINIC Raab has insisted it is “not credible” for MPs to vote down any Brexit deal and then urge the UK Government to return to Brussels to seek a better one as he suggested the key Commons vote would effectively be take it or leave it.

The Brexit Secretary made clear that any deal with the EU27 would have to be sealed by the end of November to give the Commons enough time to vote on it; Westminster rises for its Christmas recess on December 20.

Mr Raab insisted the motion on a final deal could be amended by MPs but then went on to say: “You couldn’t at the end of a negotiation process - think about it seriously and credibly - have a situation where we’ve negotiated the best deal we can with the EU and then we go back and say actually we need a bit more. And for those that say, well actually we haven’t had a say on the negotiating mandate, we had eleven votes in the House of Commons on customs union, single market and all the rest. The government won each and every one of those,” he told the BBC’s Andrew Marr Show.

Pressed on the issue, the Secretary of State said: “At the end stage of the negotiation, you can’t come back with the best deal, a few MPs or a majority of MPs say we don’t like it and think we could go back to Brussels and get better terms. That’s just not credible.”

But Sir Keir Starmer for Labour stressed it was “not in the national interest to back a bad deal” and that Parliament would not accept that the only alternative to the PM’s proposal was a no-deal.

“That majority will speak when we get to this vote,” he declared but he did not elaborate how Westminster could stop a no-deal scenario.

Sir Keir said there wa a "real lack of confidence" that Mrs May could bring back "anything by way of a good deal".

He explained: "What we're going to see is even if there's a deal, the Tory Party will try to rip it up next year; some of them are already saying they're going to do that, So, this idea of an historic moment just before Christmas in the national interest isn't going to happen. They will not stop fighting about this."