Donald Trump's secret briefing notes appear to have revealed that the wife of the US intelligence agent embroiled a diplomatic immunity row will not return to the UK.

The president had pledged to "find a way forward" after a British boy was killed in a car crash allegedly involving the wife of an American diplomat.

During a phone call with Boris Johnson on Wednesday, Mr Trump said he was committed to finding a solution as soon as possible following the death of Harry Dunn and wished to send his condolences to the family.

But a press briefing in the White House on Wednesday night, Mr Trump appeared to defend the diplomat’s wife by saying that Americans driving on the other side of the road in the UK "happens".

And photographs taken of the president's briefing notes, labelled secret at the top of the memo, appear to show the US' stance is uncompromising.