The Prince and Princess of Wales have quietly enjoyed a holiday in the exclusive French Alpine ski resort of Courchevel, I can reveal.

The royal couple were last month spotted at a high-end mountainside restaurant, where even a ham and cheese toastie costs €85 (£74), albeit a ‘truffle-infused’ one.

‘They had a very nice time and were very polite,’ a member of staff tells me.

Fellow diners who spotted the future King and his wife – looking immaculate in their ski gear – snapped photographs from afar as the pair headed out after their expensive meal.

‘I couldn’t believe I was having lunch in the same restaurant as Kate and William,’ an excitable diner tells me. ‘They looked adorable in their beanie hats.’

Dubbed ‘the Saint Tropez of the slopes’, Courchevel is known for its Michelin-starred restaurants, designer shopping and celebrity visitors such as George Clooney and the Beckhams.

It is not clear whether the Waleses’ children, Prince George, 12, Prince Louis, seven, and Princess Charlotte, ten, joined their parents on the slopes last month.

William and Kate and their eldest children first visited the French Alps in 2016 and they have since jetted off to high-end resorts for a number of private holidays.

Early last year the family went skiing with members of the Princess’s family and were spotted at a mountaintop restaurant. ‘It was a Middleton knees-up,’ said a source at the time.