Conservative ministers and MPs have been ordered to stay in the House of Commons until midnight on Tuesday amid fears of an “ambush” vote by pro-Remain MPs during the Article 50 debate.

The Government has ordered a “running whip” tomorrow and into Wednesday for the two-day debate on triggering Article 50 of the Lisbon Treaty and starting the process of Brexit, sources have confirmed.

This means that ministers and MPs will have to stay in the Commons until midnight when the House rises after the first late night sitting for five months.