MPs want to vote on Brexit policy and not be shut out of negotiations.
Theresa May is under massive cross-party pressure to grant MPs a vote on any decision to leave or limit UK involvement in the European single market, amid growing outrage at the prospect that parliament could be bypassed over the biggest economic decision in decades.
Tory MPs joined forces with former leaders of Labour and the Liberal Democrats, the SNP and Greens to insist that parliament have a say and a vote, pointing out that, while the British people had backed leaving the EU, they had not chosen to leave the biggest trading market in the western world.
Former Labour leader Ed Miliband held discussions with pro-EU Tory MPs on Saturday, and was said to be considering tabling an urgent question in the Commons, demanding that May appear before parliament to explain its future role in Brexit decisions, when MPs return on Monday.