Former UKIP leader Nigel Farage has flown to the US to help coach presidential candidate Donald Trump ahead of his next debate.

The pro-Brexit campaigner left for the US after the last head-to-head, according to the Guardian.

This won't be the first time the two have met.

Farage spoke at a Trump rally in Mississippi in August, where he said: “If I was an American citizen, I wouldn’t vote for Hillary Clinton if you paid me.”

Farage stood down as UKIP leader less than two weeks after the EU referendum, during which the UK opted to leave.

Donald Trump received a panning from commentators following his debate appearance last week, in which he boasted about not paying taxes and accused Clinton of fighting Isis her "entire life".

He has since claimed he was "holding back" in the televised debate so he didn't "embarrass her".