Even as she slowed down after a health scare in October 2021, she attended the christening of two of her great-grandchildren at Windsor.
Grandson William, whom she had grown close to after Diana's death, paid a glowing tribute to her in a recent biography.
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"The queen's kindness and sense of humour, her innate sense of calm and perspective, and her love of family and home are all attributes I experience first-hand," he wrote.
"I am privileged to have the queen as a model for a life of service to the public."