Donald Trump is "more likely than not" to win the White House in November and would be keen to forge a good working relationship with Britain, according to Sir Anthony Seldon

The billionaire's relationship with Theresa May would be unlikely to recreate the chemistry of the Thatcher-Reagan years but would be "professional and businesslike," the biographer of prime ministers including David Cameron and Tony Blair, said.

Sir Anthony, the vice-chancellor of the University of Buckingham, told The Telegraph: "People, many of them as we all know, are disillusioned with the establishment for a whole variety of reasons and he couldn't possibly be fighting a more establishment person. It's an absolute gift for him to be fighting Hillary.

"He's fought a clever campaign, he's made some mistakes along the way, but I would say he's more likely to win than not."

Sir Anthony said a first Trump term would probably be less radical than people might think.

He said: "The Constitution is well equipped to cope with a demagogue in the White House. And I think he will want to prove he's not the wild guy from the far right.

"2020 is the key date for him. He will have his eyes on the second term and that could be a lot more radical than the first."