THERESA May is today under pressure to release the legal advice she's been given about her Brexit plans - as she's accused of misleading the public by keeping key details secret.

Tory Brexiteers, Labour bosses and the PM's DUP allies are all calling for Mrs May to hand over the full details of what lawyers have told her.

3 Theresa May is under pressure to publish her Brexit legal advice Credit: AFP

Cabinet ministers fear the "Irish backstop" plan could see Britain permanently tied to the EU's customs union or end up breaking up the UK.

Michael Gove led the calls for the PM to reveal exactly what advice Attorney General Geoffrey Cox has given her.

He is understood to be backed by several other pro-Brexit ministers.

Mrs May is close to a deal with Brussels which would see the UK stay in the customs union for as long as there is no other way of keeping the Irish border open.

3 Attorney General Geoffrey Cox has been advising the PM on Brexit Credit: AFP

She wants to insert a clause allowing Britain to pull out of the backstop - but the EU is resisting the suggestion.

The two sides are now trying to come up with a compromise "review mechanism" which could bring the backstop to an end in future.

The DUP's Jeffrey Donaldson demanded to see Mr Cox's legal advice and even threatened to bring the Government down over the issue.

He told the BBC: “We’re not afraid of a General Election.

"If the House of Commons is going to have a meaningful vote on a deal upon which this legal advice is very important, then I think people are entitled to know what that legal advice is."

3 Keir Starmer blasted the PM for keeping the advice secret

Shadow Brexit Secretary Keir Starmer, who is also a QC, added: “Any agreement on the backstop can’t simply be a fudge that’s cobbled together to satisfy Theresa May’s Cabinet.

“It must be a robust and credible proposal that guarantees there will be no return to a hard border in Northern Ireland after Brexit.

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“That’s why it’s essential MPs are given the opportunity to scrutinise the Attorney General’s legal advice before voting on the final deal."

And Labour MP Ian Murray, a backer of the anti-Brexit Best for Britain campaign, blasted: "The public was lied to during the EU referendum, so the Government now has a moral duty to ensure full transparency.

“The voters are being treated with contempt by a government determined to railroad through Brexit."

​Jacob ​Reese-Mogg asks P​rime Minister Theresa May to deny that the European Court of Justice will be the final arbiter in most cases arising from Brexit

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