ITV's Phil Hornby reports on the latest developments:
President Trump says driving on the wrong side of the road "happens", when questioned about the death of Harry Dunn in Northamptonshire.
At his daily press briefing, the President was asked whether Anne Sacoolas, the wife of a US diplomat, would be allowed to speak to British police.
Harry, 19, died on August 27 near RAF Croughton when his motorbike crashed into a car driving on the wrong side of the road.
One of Mr Trump's briefing notes was captured on camera before the press conference, which seemed to confirm that Mrs Sacoolas would not be waiving her diplomatic immunity.
It read: "(If raised) Note, as Secretary Pompeo told Foreign Secretary Raab, that the spouse of the US government employee will not return to the United Kingdom."
When asked about the crash, the President said: "The woman was driving on the wrong side of the road, and that can happen. You know, those are the opposite roads, that happens.
"I won't say it ever happened to me, but it did.
"When you get used to driving on our system and then you're all of a sudden on the other system where you're driving - it happens. You have to be careful, very careful."
Jeremy Corbyn has reacted to President Trump's comments:
Downing Street have confirmed that the Prime Minister has had a conversation with President Trump urging him to send Mrs Sacoolas back to the UK.
Harry's family have also had a meeting with Dominic Raab, the Foreign Secretary, though they have expressed disappointment at the outcome.
Charlotte Charles, Harry's mother, said: "Ms Charles said: "I can't really see the point as to why we were invited to see Dominic Raab. We are no further forward than where we were this time last week.
"Part of me is feeling like it was just a publicity stunt on the UK Government side to show they are trying to help."
They have vowed to keep fighting for justice for Harry, and have been crowdfunding to raise the money for legal action. So far more than £22,000 has been donated.