The Brexit Party hopes to wipe out Labour’s heartlands in the north east of England and Wales as it prepares to campaign for a 'clean break Brexit' - but has left the door open to a pact with the Tories.

Senior sources in the Brexit Party said the mood in Labour’s pro-Leave seats was “absolutely febrile” and that they would be ripe for the taking due to Jeremy Corbyn’s vague policy on Europe.

“I know for a fact that the Labour establishment in Wales and the north east, especially Durham, are really worried,” said the Brexit Party’s spokesman.

“Of course we will have an impact on the Tories but without a shadow of a doubt we can take seats from Labour because in bars and cafes across the country voters are laughing at their Brexit stance - they haven’t got one and that is absurd.”

He added that the party’s door was open if Boris Johnson wishes to forge an electoral pact, but until that point its candidates will campaign for a “clean break” Brexit where the UK leaves all EU institutions and then negotiates a free trade deal from outside the bloc.