Nigel Farage is to be a guest of Donald Trump at next Sunday's presidential debate, as the former Ukip leader takes an increasingly prominent role in the Republican contender's campaign.

Mr Farage, who stood down as Ukip leader in the immediate aftermath of the Brexit vote, has denied that he is formally coaching Mr Trump.

But he did appear on a US television show on Sunday morning to offer some advice to the New Yorker - who was widely criticised for his performance in the first debate.

"Don’t let her get under your skin," he said.

"Whatever abuse she throws at you, ignore her! Talk to people sitting at home in their living rooms. Don’t get in a cat fight with Hillary."