A no-deal Brexit would hurt Britain more than the rest of Europe no matter how much Prime Minister Boris Johnson's government pretends otherwise, outgoing European Commission President Jean-Claude Juncker said in remarks published today.

Britain has been pressing the European Union to amend the terms of Britain's withdrawal agreement, saying Brussels would have to take responsibility for a no-deal Brexit if it does not compromise.

But at the end of the day that would do the most harm to Britain, Mr Juncker told a regional newspaper in the Austrian province of Tyrol, where he regularly spends his summer holidays.

"If it comes to a hard Brexit, that is in no one's interest, but the British would be the big losers. They are acting as though that were not the case but it is," Mr Juncker told the Tiroler Tageszeitung newspaper.

"We are fully prepared even though some in Britain say we are not well set up for a 'no deal'. But I am not taking part in these little summer games," said Mr Juncker, who is due to be succeeded by German conservative Ursula von der Leyen once she has put together her Commission.

The EU has said the withdrawal agreement negotiated by the previous British administration led by Theresa May will not be re-opened.

Mr Johnson says it wants a key element of that deal, the so-called Irish "backstop" to be scrapped.

The backstop, agreed between Brussels and Mrs May's government, aims to keep the border between Ireland and Northern Ireland open, and would effectively keep Northern Ireland within the EU's single market if no alternative arrangement can be found.

"We have made clear that we are not prepared to hold new negotiations on the withdrawal agreement but only to make certain clarifications in the framework of the political declarations that regulate future relations between the United Kingdom and European Union," Mr Juncker said.

"We are well prepared (for no-deal) and I hope the British are too."