U.K. Cabinet minister Andrea Leadsom rejected the European Union's latest plan to break the Brexit deadlock, but said Parliament will be given more chances to vote on the deal if the bloc improves its "disappointing" offer before it's too late.

Leadsom, leader of the House of Commons, said Saturday she was "absolutely astonished" that EU chief negotiator Michel Barnier was simply rehashing old ideas that Prime Minister Theresa May has already thrown out, dismissing his new proposal for the Irish border backstop as a joke.

"He seems to be on Twitter offering to go back to negotiations that were ruled out several months ago suggesting somehow that the United Kingdom should be split up and we should have a border down the Irish Sea," Leadsom said in an interview. "That is disappointing. We are within a few days of the next meaningful vote."