The Jaguar XJ40 had been “well looked after”, Livesey said, first by the Royal Estate at Kensington and then by a private owner.

“Jaguar provided cars to the Royal Family for a very long time and they produced, and continue to produce, very high quality cars,” he said.

Livesey said the history of this particular car though “definitely makes it special”.

“Whenever any of us actually meet or come close to a really famous person, you get a funny feeling,” he said.

“To have, or even own, something that belonged to them, it definitely adds an enormous value.”