Britain has already delayed Brexit once, with the original departure date of March 29 being scrapped as Theresa May’s withdrawal deal failed to pass through the House of Commons three times. The UK is currently set to leave the EU on Halloween, October 31, but polling guru John Curtice claims this would be “impossible”, as more time will be needed to pass the necessary legislation through Parliament. But it’s not all bad news, as Mr Curtice says Brexit could come just in time for Christmas. Related articles Polling guru outlines Boris' crucial weakness in race to unit country Boris Johnson v Jeremy Hunt: Leadership candidates’ Brexit views The political expert told Express.co.uk: “It is impossible to leave on the 31st October” and explained “there is not time to get the legislation through Parliament.” Instead, Mr Curtice predicted Britain would leave the EU by “Christmas at best”. He explained that the Government is in an “impasse”, as it has been unable to pass changes that satisfy the House of Commons. Not wanting to pass the buck onto just one side of the debate, Mr Curtis said the fault lies with both Remainers and Brexiteers, as both are unsatisfied by Mrs May’s withdrawal deal. Brexit could come in time for Christmas, according to polling guru John Curtice (Image: Getty) He said Remainers oppose the agreement “out of principle”, whereas Brexiteers “oppose the details” of the deal, viewing it as “too soft a deal”. Mr Curtis said “it is not obvious where we go from here”, but he is certain that Boris Johnson will win the Tory leadership contest. He said: “He is the best known face of the leave campaign and people trust him to deliver Brexit. “Two thirds of Tory members are in favour of leaving without a deal and Boris hasn’t ruled that out - he’s popular.” Related articles BBC's Katya Adler furious at Brussels predictions of Boris Brexit plan Francois voices concern of Labour last-ditch attempt to take Number 10 John Curtice says he is certain Boris Johnson will become the next UK prime minister (Image: Getty) Yesterday Mr Johnson topped the Tory leadership contest for the fourth time, securing 160 votes to Jeremy Hunt’s 77 and Michael Gove’s 75. The results saw Mr Gove eliminated from the final stage of the contest, which will see Mr Johnson and Mr Hunt battle it out to be the next UK prime minister. Conservative Party members will then decide who will succeed Theresa May. The grassroots of the party will vote via a postal ballot and the results are expected in the week commencing July 2All rights reserved for this news site express.co.uk and under his responsibility