THERESA May faces the biggest Brexit rebellion of her premiership after furious Eurosceptics today formally launched a bid to block her Chequers plan.

The Sun can reveal that Jacob Rees-Mogg and fellow Tory backbenchers have lodged a total of FOUR amendments to alter Government’s flagship Trade Bill – claiming No 10 has “broken their trust”.

Theresa May faces a formal challenge to her Brexit plans Credit: Reuters

It’s the first big show of strength by the Eurosceptic grouping on the Tory backbenches and threatens to wipe out Theresa May’s Commons majority when the bill goes before MPs on Monday.

And one of the motions is backed by the DUP - in a hint the unionist party could be ready to drop its support for the PM.

One amendment demands the UK scraps its pledge to collect taxes and duties on behalf of the EU unless EU member states vow to do likewise.

Mr Rees-Mogg today told The Sun this would effectively kill off Mrs May’s Chequers plan for a "Facilitated Customs Arrangement" as it would be impossible for EU nations to agree.

Jacob Rees-Mogg has tabled a number of amendments to the Trade Bill Credit: Reuters

Another - backed by the DUP and Labour’s Kate Hoey – would force the Government to agree in law to a commitment to never having a border down the Irish sea.

A third amendment would force the Government to commit to having separate VAT regime from the EU. A final one would force the Prime Minister to draw up primary legislation if she wants to remain in the EU’s customs union.

Mr Rees-Mogg admitted the move could weaken the PM – who has already seen Boris Johnson and David Davis resign in fury over her "soft" Brexit plan.

But he said: “Unfortunately Chequers was a breakdown in trust. Brexit meant Brexit, but now it appears Brexit means remaining subject to European laws.

“I believe this will help the Government stick to the priomises it made.

“It may resolve the dilemma the Prime Minister faces. Does she rely on Labour votes to achieve Brexit or does she change her mind and go back to Lancaster House. Will she stick to her earlier words?”

Priti Patel is another Brexiteer backing the plans Credit: Alamy Live News

The amendments were lodged with Commons authorities earlier today.

Former Cabinet Minister Priti Patel is among those to have signed them, as well as Marcus Fysh, John Redwood, Craig Mackinlay and Bernard Jenkin.

Ms Patel said: “The British people need firm guarantees that when we leave the EU we will have our own trade deals and not be subject to any EU control or veto.

“Our future prosperity rests on us being a global beacon of free trade reaching out and securing trade deals with emerging and fast growing economies. This is how we will create jobs and growth in the future.

“The 17.4million people who voted to leave the EU and those who backed the Conservatives manifesto expect Britain to have these freedoms and for there to be no future EU meddling in our trade policy and economy.”

The move comes a day after ringleaders of the Tory Brexit vote warned the PM was facing a relentless “guerrilla war” to make her drop her Chequers blueprint. The Chequers plan enraged the Tory hardliners by conceding the UK would be tied to EU rules for goods and agriculture beyond Brexit to establish a free trade area.

One source said: “This is not going to stop. We want the Chequers plan killed, and we want it killed now.”

The tactic of laying amendments to government bills has been repeatedly used by pro-EU Tories such as Dominic Grieve and Anna Soubry over the past year in a bid to hold the Government to ransom and water down Theresa May’s plans.

The PM warned Cabinet Brexit Ministers at Chequers that unless they accepted her soft Brexit vision, pro-EU Tories such as Ms Soubry could force the UK to remain in the current customs union.

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