The wife of a United States diplomat wanted for alleged involvement in a fatal hit-and-run has been named as Anne Sacoolas.

The 42-year-old is reported to have fled the country under diplomatic immunity following the crash involving 19-year-old Harry Dunn.

Police chiefs have written to the US embassy in London calling for the immunity to be waived and “allow the justice process to take place”.

Sky News revealed the woman's name on Sunday evening. The death happened at RAF Croughton in Northamptonshire on August 27.

Mr Dunn, from the village of Charlton near Banbury, was riding his motorbike near the military airbase which is used by the US Air Force.

Investigators believe he was struck by a car that was on the wrong side of the road as it left the base.

Police have said the woman allegedly involved in the accident had left the UK despite telling officers she did not plan to do so.

Speaking to Sky News, Mr Dunn’s mother Charlotte Charles begged for Ms Sacoolas to return to the UK.

She said: “Just come home. Come back to us. Come back to the UK.

"We're not a horrible family. We're a usual UK family that just need to put a face to what we have now as a name.

"Talk to her, find out how she's feeling. She's got to be suffering as well - she's a mum.

"Without knowing who this person is properly, we can't begin to try and start our grieving process."

The US embassy confirmed the incident had involved a vehicle driven by the spouse of a US diplomat assigned to UK who had departed the country, adding that diplomatic immunity was "rarely waived".

Nick Adderley, chief constable for Northamptonshire Police and Stephen Mold, Police Fire and Crime Commissioner for Northamptonshire, have confirmed they contacted the embassy and asked for immunity to be waived.

The teenager's father Tim Dunn said: "It's appalling. You can't have this precedent where just because you have this immunity you can do whatever.

"It's just basically saying 'you do what you like and you'll be OK'. That can't be right."