The Queen's faithful companion Vulcan, a dachshund-corgi cross, died a few weeks ago. He is believed to have passed away at Windsor Castle, where the Queen and Prince Philip have spent the second national lockdown.
The death of Vulcan comes just in the run-up to an unusual Christmas for the Queen and Prince Philip, and is said to have ben a blow for her.
A palace source told The Sun: “Clearly the loss of a loved pet is upsetting.”
The Queen is famous around the world for her love for dogs, in particular for the corgi breed.
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Throughout her life, she has owned more than 30 dogs - with all the corgis descending from, Susan, a pet she received as an 18-year-old birthday present.
The Queen took the heartbreaking decision to stop breeding Pembroke Welsh corgis in 2015, as she did not want them to outlive her and remain alone after her death.
In April 2018 Willow, a 14th-generation descendant of Susan, was put down after being found with a cancer-like illness.
The Queen’s last corgi, Whisper, sadly died six months later.
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The faithful pet is thought to have been buried on the grounds of the monarch's Berkshire castle.
It is not known how old he was and how he died.
However, he is known to have been at the side of the Queen since 2007 - making him at least 13 year old.
The Queen is now left only with one last dog, Candy - who, together with the monarch and Vulcan, was featured on the front cover of Vanity Fair in 2018.