British Prime Minister Theresa May says she sees no alternative to the Brexit deal she presented earlier this week, amid reports that some of her senior ministers want her to renegotiate the draft agreement before meeting EU leaders next weekend.

"There is no alternative plan on the table. There is no different approach that we could agree with the EU," May wrote in an article for the Sun on Sunday newspaper.

"If MPs (legislators) reject the deal, they will simply take us back to square one. It would mean more division, more uncertainty and a failure to deliver on the vote of the British people," she added.