Foreign Secretary Dominic Raab has spoken to his US counterpart about the American diplomat’s wife wanted for alleged involvement in a fatal hit-and-run in the UK.
Anne Sacoolas is wanted by British police over a road crash that killed 19-year-old Harry Dunn, whose motorbike collided with a car in Northamptonshire on August 27.
The crash took place close to RAF Croughton, a military base used by the US Air Force.
Ms Sacoolas, who left the UK after the crash despite telling officers she did not plan to do so, is believed to have been driving on the wrong side of the road.
A Foreign Office spokesman said Mr Raab and Secretary of State Mike Pompeo discussed Ms Sacoolas’ decision to seek diplomatic immunity during a phone call on Monday.
The spokesman said the foreign secretary “reiterated his disappointment with the US decision (not to waive diplomatic immunity for Anne Sacoolas) and urged them to reconsider”.
Mr Raab also discussed other issues including Brexit, Hong Kong, Syria and Iran.
Police have written to the US embassy in London to demand Ms Sacoolas’ immunity is waived.
Earlier today, Boris Johnson urged the US to reconsider its decision and vowed to raise the case with the White House if necessary.
Mr Johnson said: “I do not think it can be right to use the process of diplomatic immunity for this type of purpose.”
Speaking to reporters during a visit to a hospital in Watford, the Prime Minister added: “I think everybody’s sympathies are very much with the family of Harry Dunn and our condolences to them for their tragic loss.
“I must answer you directly, I do not think that it can be right to use the process of diplomatic immunity for this type of purpose.
“And I hope that Anne Sacoolas will come back and will engage properly with the processes of law as they are carried out in this country.
“That’s a point that we’ve raised or are raising today with the American ambassador here in the UK and I hope it will be resolved very shortly.
“And to anticipate a question you might want to raise, if we can’t resolve it then of course I will be raising it myself personally with the White House.”
The US embassy in London confirmed the incident had involved a vehicle driven by the spouse of a US diplomat who had departed the country, but added that diplomatic immunity was “rarely waived”.
In a statement, the embassy said: “We express our deepest sympathies and offer condolences to the family of the deceased in this tragic traffic accident.
“Any questions regarding a waiver of the immunity with regard to our diplomats and their family members overseas in a case like this receive intense attention at senior levels and are considered carefully given the global impact such decisions carry; immunity is rarely waived.
“The US embassy has been and will continue to be in close contact with appropriate British officials.”
Harry’s mother Charlotte Charles said: “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.”
Ms Charles added: “If we have to we will go to Washington. We don’t want it to have to come to that, we don’t see why it should have to come to that… we just want to sit and talk with her.
“We just don’t understand how you can just get on a plane and leave behind the devastation she has without even speaking to us or facing us, or an apology of any kind.”
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.”