BORIS Johnson has urged David Cameron to stay on as Prime Minister beyond 2020 - using a Worcester visit to urge the PM to u-turn on his intention to quit.

Amid the big national Brexit debate the Mayor of London - who has been at loggerheads with Mr Cameron this week - came to the city last night for a Tory bash at Sixways.

During his visit Mr Johnson, the biggest public figure to be backing the 'out' campaign over the EU, made a dramatic bid to repair some of the fragile tensions between him and the PM by appealing for him to stay in Downing Street.

In front of a host of Worcestershire MPs he said Mr Cameron should change his mind, insisting "one conversation with a BBC journalist" should not be allowed to bring his entire premiership to an early end.

In March last year Mr Cameron said he intended to step down before the next General Election and not stand for a third term - something teased out during a BBC profile interview in his kitchen.

No date for his departure has been set but the PM has insisted he wants to serve a "full term" before leaving - with the crunch EU referendum outcome likely to play a big part.

Last night's Sixways bash was an internal party fundraiser for police and crime commissioner candidate John Campion, who is standing in West Mercia in May.

It brought Mr Johnson, who Mr Cameron has suggested is trying to further his own personal career ambitions by backing the 'out' camp, into contact with four county MPs who want to stay in the EU.

Worcester MP Robin Walker said: "The EU issue did come up, you'd expect it to - Boris said we all have a view on Europe, he explained his and said it's brilliant we've secured a referendum to give people a chance to have their say.

"He did also say he felt David Cameron should stay on as Prime Minister after the next election and said 'one conversation with a BBC journalist' shouldn't be the reason he stands down."

He also there was a "very positive vibe" in the audience about Mr Johnson's views.

Fellow county MP Karen Lumley, who organised it, said: "He did say that when this is all over (the EU referendum) he hopes David Cameron will change his mind and stay on.

"He's laid out his view. The Prime Minister made it quite clear on Monday though that he was going, he said he didn't intend to be here for another term."

Mr Johnson is one of the red hot favourites to be next Tory leader.

Earlier this week Mr Johnson said the PM had "wildly exaggerated" the Brexit fears, opening up a feud with Downing Street.

In the Commons on Monday Mr Cameron responding by saying: "I won't dwell on the irony that some people who want to leave in order to remain.

"I'm not standing for re-election - I have no other agenda than what is best for our country."

Around 400 people attended the event last night where Mr Johnson delivered a speech and did an audience Q&A, taking questions on all manner of subjects from police and crime commissioners to his background, the life of an MP and being the Mayor of London.