One of the scenes shows the Queen describing the crown, which weighs nearly 22 pounds as "very unwieldy", to which Bruce adds: "It's hard to always remember that diamonds are stones and so they're very heavy".
The Imperial State Crown includes sapphires belonging to St Edward the Confessor and Alexander II of Scotland, a ruby from Edward the Black Prince, pearls from Elizabeth I and the Cullinan II diamond. The details of the story was later revealed to her by the royal commentator Alastair Bruce. Telling her seemed strangely odd'.
The details were unearthed by Oliver Urquhart Irvine, the assistant keeper of the Royal Archives.
This correspondence was an "electric set of letters" from royal librarian Sir Owen Morshead to Queen Mary, the mother of George VI. A trapdoor to access the hiding spot still exists today.
There has always been speculation that the jewels were taken from the Tower of London to Windsor in the war.
In the documentary, which airs in full on Sunday January 14, Queen Elizabeth candidly explained that the crown wasn't her only source of discomfort.
Britain's queen speaks about weight of the crown in documentary
That much was clear after he was with the Queen when she watched her coronation for the very first time, as part of the upcoming documentary The Coronation, which examines the 1953 ceremony on its 65th anniversary.
The Queen has opened up about the literal weight of responsibility that comes with being the head of the monarchy - and wearing the crown.
"Fortunately my father and I have about the same sort of shaped head". "But once you put it on, it stays". "I mean, it just remains itself".
"It's fun to see", Queen Elizabeth said.
"You can't look down". Because if you did, your neck would break, or it would fall off. Anxious that the weight of the elaborate jewels at the centrepiece of her crown would injure her neck, she quips: "So there are some disadvantages to crowns, but otherwise they're quite important things".
In the program, the queen notes that the crown has been reduced in height since being worn by her father, King George VI.More news: Pakistan suspends military and intel cooperation with US
More news: Baylor's Matt Rhule Passes on National Football League to Remain in Waco with Bears
More news: Flu Widespread in 36 States, Deaths Reported: CDC