SKIPTON MP Julian Smith is amongst senior Tories to come under fresh pressure after claims that they deliberately broke voting pacts during a knife-edge Brexit vote.

Chief Whip Mr Smith apologised and said Tory Party chairman Brandon Lewis had been "asked to vote in error" after a pairing agreement with a senior opposition MP on maternity leave was broken.

Mr Lewis said it had been an "honest mistake" in fast-moving circumstances.

But the party chairman and two other Tory MPs were told by Mr Smith that they should go ahead and vote despite being paired, according to the Times.

It said the two unnamed MPs both sought further advice and ignored the instruction.

Labour has demanded the resignations of the two senior Tories if they fail to give a full explanation over the whipping operation.

Mr Lewis had been "paired" with Liberal Democrat deputy leader Jo Swinson, meaning neither would walk through the voting lobbies.

But the Tory MP then took part in two crunch Commons votes on Tuesday night and helped Theresa May narrowly avoid a damaging defeat on Brexit trade plans.

During Prime Minister's questions, Mrs May told MPs: "The breaking of the pair was done in error. It wasn't good enough and will not be repeated."

Labour said the Chief Whip and the party chairman should quit if they could not account for what happened.

Conservative MP Heidi Allen also raised concerns about the claims.

She said: "I sincerely hope this isn't true. No matter how tough the going gets, principle, integrity and standards matter. Without those, what's left?"

Shadow equalities secretary Dawn Butler said: "If these reports are correct, the Tory whips, Brandon Lewis and even the Prime Minister have been telling untruths about their shocking move against an MP on maternity leave.

"Breaking a pairing arrangement was a desperate move by a collapsing Government and makes politics even more inaccessible for women.

"We need a full, honest explanation of what's gone on. If they can't do so, surely the Chief Whip and Conservative Party chair should resign."