article: Mr Farage said he believed the Leave campaign were on course for victory. But he said there would be resentment, particularly in the Conservative Party, if not, with claims the referendum will not have been a fair contest. Number 10 said Mr Farage's comments showed he was losing the argument and was no longer confident of winning. And Prime Minister David Cameron said it was a "once in a generation, once in a lifetime" decision, saying the UK had "referendums not Neverendums". There are less than six weeks until voters go to the polls to decide whether they want the UK to stay in or leave the European Union. The question of a second referendum was raised by Mr Farage in an interview with the Mirror in which he said: "In a 52-48 referendum this would be unfinished business by a long way. If the Remain campaign win two-thirds to one-third that ends it." Meanwhile, in other campaign news: Asked by the BBC about his Daily Mirror comments, Mr Farage said he was not admitting defeat in the referendum, saying: "I think we are going to win." But he added: "If we were to lose narrowly, there'd be a large section, particularly in the Conservative Party, who'd feel the prime minister is not playing fair, that the Remain side is using way more money than the Leave side and there would be a resentment that would build up if that was to be the result." Leave campaigners have criticised the government for spending Â£9m of taxpayers' money on a leaflet campaign promoting EU membership, with pamphlets sent to 27 million UK homes. They say the campaign, which they have called "one-sided propaganda", cost more than the Â£7m each side is allowed to spend during the official campaign period. The prime minister has said that the idea of a second referendum is "for the birds". He hopes this referendum will settle the question because the last thing he wants is for it to produce a narrow result. That could indeed end up resulting in continuing pressure to open up the vote again - just at the time when he'll be struggling to heal the wounds that have opened up during this battle. But Mr Cameron has defended the leaflets, saying the government is "not neutral" in the campaign and it was "money well spent". He said the government had a duty to give voters the "facts". Speaking to the BBC, Mr Farage denied that his suggestion he would fight for a second referendum would further stoke tensions in the Leave campaign. "I'm not putting it on the agenda, I don't want a second referendum - I want to win this one," he said. BBC assistant political editor Norman Smith said Mr Farage's comments opened up the prospect of a repeat of the aftermath of the Scottish referendum - where despite leading SNP figures saying the vote would settle the issue for a generation, there have since been renewed calls for another independence vote. As the Leave and Remain camps continue to exchange fire
summary: There could be unstoppable demand for a re-run of the EU referendum if Remain wins by a narrow margin on 23 June, UKIP leader Nigel Farage has said.