May implores parliament in final bid to save Brexit deal

London: Prime Minister Theresa May on Wednesday implored British MPs to back her reworked EU divorce deal but saw pro-Brexit Conservatives and opposition parties savage her bid for a compromise to end months of political crisis.

On the eve of European elections Britain had not expected to hold three years after the Brexit referendum, May urged lawmakers who have repeatedly rejected her plan to vote for it in early June so that the country can finally leave the bloc later in the summer.

"The opportunity of Brexit is too large and the consequences of failure too grave to risk further delay," the prime minister, who has vowed to stand down following the crunch parliamentary vote, told the House of Commons.

"Reject it and all we have before us is division and deadlock."

May outlined a package of "compromise measures" aimed at securing the support of MPs from the main opposition Labour Party, which included giving parliament a vote on holding a referendum on her divorce deal.

But Labour leader Jeremy Corbyn, who last week pulled out of weeks of cross-party Brexit talks citing the government's unwillingness to compromise, said it was "little more than a repackaged version of her three-times rejected deal".

"The rhetoric may have changed but the deal has not," he added.

Amid strong opposition from May's Conservative colleagues to the new move, Ian Blackford, leader of the Scottish National Party in Westminster, said the embattled prime minister was "fooling no one but herself."

"Her own party doesn't want her deal... Her time is up."

In a sign of the scale of the apparent internal backlash, Environment Secretary and Brexiteer Michael Gove hinted that the vote in the week of June 3 may not even go ahead.

"We will reflect over the course of the next few days on how people look at the proposition," he told BBC radio.

May's offer comes as Britain votes in EU elections Thursday with the two main parties trailing behind the Brexit Party and the pro-EU Liberal Democrats, according to polls.

The latest YouGov survey showed eurosceptic populist Nigel Farage's new Brexit Party claiming 37 per cent of votes, with the Lib Dems second on 19 per cent, followed by Labour on 13 per cent and the Tories lagging in fifth place with just seven per cent.