Latest EU referendum poll of polls: Brexit just trails Remain as German finance minister fires warning

YouGov's rolling seven-day average shows Remain has held its slim lead with 43 per cent of those polled backing the European Union.

Meanwhile after its first day, our latest weekly online poll shows 63 per cent of voters intend to vote Leave.

This is the lowest pro-Brexit percentage so far, but could yet change with six more days left to vote.

And in other referendum news, Germany's finance minister has indicated the UK will not have access to the single market if it votes for Brexit on June 23

Wolfgang Schaeuble said a relationship of the kind enjoyed by Norway or Switzerland "won't work" for Britain, telling the news magazine Der Spiegel: "In is in. Out is out."

Former European commissioner Lord Mandelson said Mr Schaeuble's intervention dealt a final blow to claims of some within the Leave camp that the UK would be able to maintain trade with its former EU partners after Brexit on a similar basis to before.

And it throws doubt on the hopes of some Remain supporters that a Brexit vote could be followed by negotiations to tie the UK closely into European trading structures as a non-member.

Chancellor George Osborne described the comments - in a Brexit special of the top-selling magazine whose front-page headline read Please Don't Go! - as a "major intervention" in the referendum debate.

Norway gains access to the tariff-free Single Market through European Economic Area arrangements, which require it to adopt the bulk of Brussels regulations, accept free movement of labour and pay into EU budgets. Switzerland has a similar deal based on treaties.

They have been held up by some Brexit supporters as models for Britain's future relations with Europe, though Leave campaigner Michael Gove has said he would rather rely on a free trade area stretching across the continent taking in EU non-members.

Asked whether the UK could be granted a Norwegian or Swiss-style deal, Mr Schaeuble told Der Spiegel: "That won't work. It would require the country to abide by the rules of a club from which it currently wants to withdraw. If the majority in Britain opts for Brexit, that would be a decision against the single market. In is in. Out is out. One has to respect the sovereignty of the British people."

The German finance minister said it would be a "miracle" if withdrawal from the EU had no negative economic consequences for the UK, and said he was already working with eurozone colleagues on preparations to limit the potential impact on the rest of Europe.

Stronger In campaigner Lord Mandelson said: "This finally knocks on the head the Leave campaign's claim that we can leave the EU and still enjoy the benefits of the single market. We cannot leave the club and continue to use its facilities.

"Being outside the single market would be a hammer blow to the UK economy. Our future trade will be hit and our manufacturing sector, which relies on the single market's free movement of goods and people, will be at risk.

"This is the cold reality of Brexit that the British people must face. If we leave we lose the economic gains of being the world's largest free trade zone, putting jobs and livelihoods at risk."

Mr Schaeuble said the EU could function without Britain, though he raised concerns that other countries, such as the Netherlands, may be tempted to follow the UK's lead.

He poured cold water on predictions that Brussels will push for more integration in the wake of the vote.

"In response to Brexit, we couldn't simply call for more integration," said Mr Schaeuble. "That would be crude; many would rightfully wonder -whether we politicians still haven't understood."

He made clear he expected Britons would soon regret a choice to leave.

"At some point, the British will realise they have taken the wrong decision," he said. "And then we will accept them back one day, if that's what they want."

Mr Schaeuble's comments come after Chancellor Angela Merkel repeated her support for UK membership, telling a business audience: "From my point of view, Great Britain remaining in the European Union is the best and most desirable thing for us all."