The UK's attorney general says Brexit negotiations will continue as EU officials call for "acceptable" ideas by Friday to break the impasse.
Geoffrey Cox said plans to solve the deadlock over the Irish backstop were "as clear as day", with just days until MPs vote on the Brexit deal.
Commons Leader Andrea Leadsom confirmed the vote will be held on 12 March.
Chancellor Philip Hammond has warned Brexiteers to vote for the deal or face delay to the UK's exit from the EU.
The backstop is an insurance policy designed to prevent physical checks on the border between Northern Ireland and the Republic of Ireland.
Mr Cox, who was in Brussels on Tuesday to push for further changes to the Brexit deal, said talks will "almost certainly" continue through the weekend.
He said there had been "careful discussions" with the EU and stressed it was government policy to seek the legal changes to the backstop.
"We are discussing text with the European Union," he said.
"I am surprised to hear the comments that have emerged over the last 48 hours that the proposals are not clear; they are as clear as day, and we are continuing to discuss them."