Princess Diana had something terribly wrong with her appetite, says former staff.

Mervyn Wycherley, who served Royals for 33 years, says that he gauged Diana has an eating disorder while he was still working for her.

Speaking of the time, he told The Sun: “You knew things weren’t quite what they should be.”

He added: “[This included] cold lamb cutlets and mint aspic so that she could just snack whenever she wanted to.

“Of course with the illness there was bowls of custard which were obligatory.”

Mervyn said: “They could never eat [at dinners] because people don’t want to see them eating, they want to actually talk all the time.

“So they could go to these dinners, chop a few things up and not eat anything and come back absolutely starving.

“I always left stuff in the fridge so that they could have something to snack on.”

Meanwhile, Ken Wharfe, a former royal protection officer, told The Sun’s Matt Wilkinson: “It was serious.”

“It was an eating disorder but by the time I arrived there that illness had moved on.”