The late Queen Elizabeth II was always known for being one of the hardest-working royals in British history, with an unwavering and unmatched dedication to her duties.

One of the most frequent and important roles that the mother of King Charles played was presiding over the State Opening of Parliament .

© Getty Images Queen Elizabeth II at the State Opening on Parliament in 1970

During her reign of more than 70 years, Queen Elizabeth presided over every State Opening, except for three, facing the challenge of reading the Government's legislative programme, without stuttering or making any mistakes, while wearing the Imperial State Crown .

At 2.3 lb, just over a kilogram, it's no easy feat, especially for a person of the late Queen's age towards the end of her reign – so how d

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