The Royals are renowned for their “stiff upper lip” approach to life, traditionally favouring to conceal their feelings behind an inscrutable facade of equanimity. However, the Duke and Duchess of Cambridge are keen for Prince George, 8, Princess Charlotte, 6, and Prince Louis, 3, to be able to express their emotions openly and without inhibition. “Open communication is key for them. … [But they] set boundaries and have rules in place,” a source close to the family told Us Weekly.

They added that Kate and William wanted their children “to express their emotions and ask questions to enable them to grow up as healthy adults.”

The Cambridge family spent most of the pandemic billeted at their Norfolk residence, Anmer Hall.

Like other parents up and down the country, William and Kate spent many hours homeschooling their three kids.

In a candid interview with Peter Crouch for his podcast, the Duke of Cambridge admitted that his patience had been sorely tested and that he had been found wanting in his knowledge of maths.

He told the ex-footballer: “I’ve found it pretty testing, not going to lie, trying to keep the children engaged in some kind of work, it’s been an interesting few months.”

“I’ve learned through homeschooling that my patience is a lot shorter than I thought it was, that’s probably been the biggest eye opener for me, and that my wife has super patience.

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Ms Glassborow famously worked as a Codebreaker at Bletchley Park during the second World War.

The Duchess explained: “I had an amazing granny who devoted a lot of time to us, playing with us, doing arts and crafts and going to the greenhouse to do gardening, and cooking with us.

“I try and incorporate a lot of the experiences that she gave us at the time into the experiences that I give my children now.”