MPs have begun putting forward proposals to change the outcome of Brexit ahead of next week's scheduled vote on Theresa May's amended deal, the BBC reports.
Mrs May will meet her cabinet after telling MPs on Monday that she was focused on altering the Irish backstop.
But Labour leader Jeremy Corbyn said the prime minister was in denial about the level of opposition to her deal.
Among the MPs' amendments are plans to prevent a no-deal Brexit and to extend the deadline for leaving the EU.
An official Labour Party amendment says that MPs should be able to vote on options such as the party's preferred outcome of a closer relationship with Europe, with a permanent customs union.
It also asks MPs to decide whether they should hold a further referendum on whatever Brexit plan is approved by the House of Commons.
Mr Corbyn said the amendment allowed MPs "to end this Brexit deadlock" and prevent the "chaos" of leaving the EU without a deal.
But Mrs May warned that another EU referendum could threaten the UK's "social cohesion".
Last week the UK House of Commons voted 432 to 202 today to reject Prime Minister Theresa May’s Brexit deal.