A delegation of pro-Brexit politicians and campaigners will this week warn the EU’s chief negotiator that there is “huge support” for reverting to WTO rules instead of accepting a bad deal, in what they say will be a display of Churchillian “iron will.”

Steven Woolfe, an MEP, will meet with Michel Barnier in Brussels along with former CBI head Lord Digby Jones, Labour Leave chairman John Mills, and former British Chamber of Commerce chief John Longworth.

The group hopes to foster a more positive tone in the negotiations and to show Mr Barnier that large swathes of the UK are determined to quit the bloc - despite bids from Tony Blair and Lord Adonis to reverse the referendum result.

Mr Woolfe said he set up the meeting as he was irritated that the EU’s chief negotiator initially appeared to be exclusively speaking with opponents of Brexit.

Mr Barnier's spokesman has said that his door is "always open" to those who wish to discuss Brexit with him.

“I think the EU has recognised there has been a bit of an echo chamber - it wasn’t just Blair, Adonis and [Kenneth] Clarke, but they also saw the leader of Scotland, the leader of Wales and on two occasions Jeremy Corbyn,” Mr Woolfe told the Telegraph.