Tory Remainer rebels are set to seek Brexit revenge by trying to defeat the Government over a plan to keep the UK in a customs union with the EU as Liam Fox accused them of giving Brussels exactly what it wants.

Europhile Conservative backbenchers were left incensed on Monday after Theresa May bowed to the demands of Eurosceptics and hardened up her Brexit plan.

The decision to accept four Brexiteer amendments to the Customs Bill, including one which Eurosceptics believe has effectively killed off the Prime Minister’s Chequers plan, has galvanised Remain-backing MPs to pursue their own bid to change the Government’s strategy.

They will seek to amend the Trade Bill on Tuesday evening to force the Government to pursue a customs union deal with the EU if Mrs May is unable to deliver by mid-January 2019 - just two months before the formal March 2019 withdrawal date - her Chequers plan for a UK-EU free trade area.

The rebels believe this would give the Government a viable fallback option if a deal is not done but ministers believe it would bind the Prime Minister’s hands.

Downing Street believes it would effectively incentivise Brussels not to negotiate with Mrs May over her plan because a customs union deal would also be on the table.