She said: "I offer my sincere condolences to the Queen on the loss of her husband after 73 years and to the rest of the royal family who’ve lost a father, a grandfather and a great grandfather.
"He has been a huge strength and support to the Queen throughout her reign, as she herself has said on many occasions
"His decades of public service have been appreciated by so many. I think particularly of The Duke of Edinburgh award scheme, which made such a big contribution to connecting young people with nature and the outdoors.
"Like so many people across the country, my thoughts are with the Queen and her family today."
You can read more about the life and death of Prince Philip here.Brighton Museums has also taken to Twitter to express its condolences. In its tweet it mentioned the fact the Prince visited the Royal Pavilion in 1979 to see restoration work following the 1975 fire in the Music Room.