Britain insists US diplomat’s wife Anne Sacoolas does not have immunity over her deadly crash — while she plans to meet the dead teenager’s parents to apologize when they fly to New York on Sunday, according to reports.

The UK’s Foreign Secretary, Dominic Raab, wrote to the family of Harry Dunn, the 19-year-old motorcyclist killed in an August crash with Sacoolas’ car, and insisted that she can no longer claim immunity after fleeing the UK.

“We have looked at this very carefully,” he wrote, according to the BBC.

“The UK government’s position is that immunity, and therefore any question of waiver, is no longer relevant in Mrs. Sacoolas’s case, because she has returned home.

“The US have now informed us that they too consider that immunity is no longer pertinent,” he insisted, despite the US having “steadfastly declined” to give a waiver to get her to return.

The Dunn family’s lawyer, Mark Stephens, called Sacoolas “a fugitive from British justice” and insisted to SKY News, “She wasn’t entitled to diplomatic immunity in the first place.”

That opens up options of suing her in the US, Stephens told Sky News.

The developments come as Dunn’s grieving parents, Charlotte Charles and Tim Dunn, are expected to fly to America on Sunday, arriving first in New York before heading to Washington D.C., according to the BBC.

Sacoolas’s lawyer, Amy Jeffress, insisted the mom-of-three from Vienna, Virginia, was “devastated by this tragic accident” and wants to express it in person.

“Anne would like to meet with Mr Dunn’s parents so that she can express her deepest sympathies and apologies for this tragic accident,” Jeffress told the BBC.

“We have been in contact with the family’s attorneys and look forward to hearing from them.”

She added, “No loss compares to the death of a child and Anne extends her deepest sympathy to Harry Dunn’s family.”

Jeffress insisted that Sacoolas had “fully co-operated with the police” at the time of the crash and “will continue to co-operate with the investigation” by Nottinghamshire police, the BBC said.