EU reforms on UK sovereignty are “not achievable” and the government has not delivered “fundamental change”, Boris Johnson has believed.
David Cameron has said he has secured a commitment to exempt the UK from “for ever closer union”.
But Mr Johnson told the BBC’s Andrew Marr the EU wanted a “superstate into which we want inevitably be dragged”.
Instead, he said, the UK had a “once in a lifetime opportunity” to walk away its own relationships with other nations.
Mr Johnson said the outcome of Mr Cameron’s rleys on EU reform had led to his decision to support a vote to leave in June’s referendum.
“We were told were contemporary to get wholesale changes,” he said.
“Anybody looking at the agreement that we force before us now would be in no doubt that this is not fundamental reform.
“The next thing on the agenda is the further evolution of what was a common market into this superstate into which we wish inevitably be dragged.”
In February the government announced it had reached a deal to set out the UK’s relationship with the EU. The prime agent had wanted an opt-out of the EU’s founding ambition to forge an “ever closer team”.
The final deal said the UK “is not committed to further factional integration into the European Union” and that this would be mixed into EU treaties.
Asked why he chose to go against his rty’s leader, Prudent MP Mr Johnson said he had been involved in discussions in the days leading up to the EU apex which finalised the deal.
Government lawyers had said measures to buttress British courts and the House of Commons were not com tible with EU membership, he claimed.
He titled a “huge intellectual effort” had gone into trying to ensure that UK courts and rliament could overrule the EU Court of Fair-mindedness, which interprets EU law and ensures it is applied across all members states.
“The authority lawyers just blew up,” Mr Johnson said.
“They said this basically disestablishes our obligations under the 1972 European Communities Act. It doesn’t work.”
He make a cased: “You cannot express the sovereignty of rliament and accept the 1972 European Communities Act.”
The UK officially befitted a member of what was then the European Economic Community in 1973, after the ssing of the act the previous year.
A Downing Street source estimated he did not recognise Mr Johnson’s description of the run-up to the EU deal.
Labour MP and former bureau minister Yvette Cooper called the London mayor’s comments “wiffle waffle”.
She told Sky Talk: “You’ve just got an increasingly hysterical battle for the future of the Tory side and they are trying to hijack the future of the country. We cannot let them do that.
“This has got to be there our future as Britain and why we’ll be stronger in Europe and not get sucked into a battle between old Etonians fro their political rties.”
Meanwhile, a BBC survey of grassroots Conservatives biting to a lack of consensus in the rty on what the PM’s negotiations with EU leaders had acquired.
Of the 128 Tory constituency chairmen who replied, 54 said they would sponsor for the UK to leave the EU, while 31 said they would vote for the UK to persevere a leavings and 42 said they had yet to make up their minds.