Labour will today use a Commons motion to try and block the next Tory prime minister from forcing through a no-deal Brexit.
The party, with the backing of the SNP and the Lib Dems, will vote to give MPs control of the parliamentary timetable on June 25.
Labour say if the motion passes, MPs will be able to introduce legislation to avoid a no-deal scenario at the end of October.
The question of whether a no-deal Brexit should happen has dominated the Tory leadership race, with some candidates refusing to rule out shutting parliament down altogether to ensure it happens.
Shadow Brexit secretary Sir Keir Starmer MP said: “The debate on Brexit in the Tory leadership contest has descended into the disturbing, the ludicrous and the reckless.
“None of the likely candidates for the top job has a credible plan for how to break the deadlock before the end of October. Instead, we have witnessed candidates openly advocating a damaging no deal Brexit and even proposing dragging the Queen into politics by asking her to shut down Parliament to achieve this.
“MPs cannot be bystanders while the next Tory Prime Minister tries to crash the UK out of the European Union without a deal and without the consent of the British people. That’s why we are taking this latest measure to end the uncertainty and protect communities across the country.
“My challenge to MPs who disagree either with a no deal Brexit or proroguing Parliament is to back this motion and act in the national interest.”
Theresa May’s government has previously allowed some opposition day motions to pass unopposed, however ministers will be very reluctant to allow this bid to pass.