Harry Dunn's family furious over claim Foreign Office failed to tell police Anne Sacoolas was leaving the UK

Government official texted US counterpart saying there was 'not much mileage' in opposing the departure, according to ITV News

The Government failed to tell police the American woman accused of killing Harry Dunn in Northamptonshire was leaving the country, it has been claimed.

In fact, a Foreign and Commonwealth Office official texted his US counterparts saying there was 'not much mileage' in them objecting to Anne Sacoolas' departure, according to ITV News.

Harry's mother, Charlotte Charles, said: "It's just beyond belief that given the number of times we've with met them.

Harry Dunn

"We should have been properly grieving in those first few months. We should have been given the chance and we deserved the truth.

"To send that in a text message, I mean seriously, who the hell have we got running our country?"

Harry, 19, died after his motorcycle was involved in a collision with Sacoolas' Volvo, which she has admitted was on the wrong side of the road, near Croughton on August 27, 2019.

The driver initially co-operated with police but then claimed diplomatic immunity and flew back to the United States a few weeks later.

However, documents seen by ITV News show the Foreign Office was asked if there was anything stopping the Sacoolas family from leaving the country.

On September 13, two senior Government officials met representatives from the US embassy who said diplomatic immunity would not be waived and they would return to the US unless the UK had strong objections - which officials say they expressed.

But the following day a senior Foreign Office official sent a text message to their US embassy counterpart saying: "I think that now the decision has been taken not to waive [diplomatic immunity], there's not much mileage in us asking you to keep the family here.

"It's obviously not us approving of their departure but I think you should feel able to put them on the next flight out..."

On September 15, Sacoolas and her family flew back to America and Northamptonshire Police only found out she had gone in a call with the Foreign Office the following day.

Harry's family's spokesman, Radd Seiger, said: "We do not yet know who was responsible for making these decisions.

"But let me be clear, given the damage and anguish this has caused to the family, we will find out and ensure that those responsible for this obvious misconduct in public office will be held to account.

"We will leave no stone unturned in our search for the truth, no matter how high up the chain this goes and woe betide anyone who attempts stands in our way."

A Foreign Office spokesperson said they consistently called for Sacoolas’ immunity to be waived before she left the UK.

"Both the Prime Minister and the Foreign Secretary have been clear with the US that the refusal to extradite her amounts to a denial of justice, and that she should return to the UK," they added.

“We have the deepest sympathy for Harry’s family. We have done and will continue to do everything we properly can to ensure that justice is done.”

Sacoolas remains in the US after the White House turned down an extradition request from the British government to face her charge of causing death by dangerous driving.