She has been on the throne for more than 65 years, fulfiling her public duties, unifying the Commonwealth and providing the steady role-model the nation needs in turbulent times.

The Queen has also single-handedly kept the hat industry in business, according to Philip Treacy.

Treacy, the milliner used regularly by members of the Royal family, said the Queen had “kept hats alive in the imagination of people all over the world”, ensuring their survival even as most of her subjects largely abandoned them.

Now, he said, young women are choosing to wear hats again as they come back into fashion as an accessory of “rebellion”.

Speaking on Radio 4’s Desert Island Discs, Treacy, who made dozens of hats for guests at the wedding of Prince Harry and Meghan Markle, said: “The patronage of the Royal Family keeps hats alive.