Pro-European Tories have warned David Davis they are “deadly serious” about rebelling against the Government in a bid to secure a vote on the final Brexit deal.

Nicky Morgan, the chairman of the Treasury select committee, warned the Brexit Secretary that a group of Tory MPs are not bluffing in their demand for a meaningful vote on the terms of withdrawal before the UK leaves the bloc in March 2019.

Meanwhile, Labour insisted it wanted a “cast iron guarantee” that a vote will be held in a move which is likely to heap further pressure on ministers to grant a concession to avoid a damaging defeat.

It comes after Mr Davis was forced into a climbdown on Wednesday for saying that Parliament may not be given a vote until after March 2019.

Theresa May contradicted Mr Davis just one hour later at Prime Minister's Questions, telling MPs she was "confident" they would get a vote before Britain left the EU.