It’s also true that Princess Margaret had an an affair with her late father George VI’s equerry, RAF Group Captain Peter Townsend, and she did issue a public statement in 1955 explaining that she would not go through with marriage owing to the Church of England’s stance on divorcees.

As for the despised portrait of Winston Churchill painted by English artist Graham Vivian Sutherland, who was commissioned to celebrate the Prime Minister’s 80th birthday in November 1954, the work of art was never burned in the back garden of Churchill’s home, Chartwell. But according to historian Sonia Purnell, who discovered a forgotten recording of the couple’s Private Secretary, Grace Hamblin, the painting was destroyed by Hamblin and her brother at the request of Lady Clementine Churchill.

At the same time, there are some events that can never be definitely proved. No evidence has ever been provided to prove the rumours of Prince Philip’s infidelity, although Ingrid Seward, royal biographer and author of My Husband and I: The Inside Story of 70 Years of the Royal Marriage, told the Radio Times: “She was forgiving of him, because she felt that he’d been emasculated by her position, and he’s a very alpha male.”

Netflix’s The Crown: Your most Googled questions about the show, answered