[2] He was the tenth and youngest child, and the sixth son, of Claude Bowes-Lyon, 14th Earl of Strathmore and Kinghorne, and Cecilia Nina Cavendish-Bentinck.During World War II, Bowes-Lyon was a member of the secret propaganda department Political Warfare Executive.He was one of eight sponsors of the prince, along with King George VI, King Haakon VII of Norway, Queen Mary, Princess Margaret, the Dowager Marchioness of Milford Haven, Patricia, Lady Brabourne, and Prince George of Greece and Denmark.[5] As a keen gardener, Bowes-Lyon was awarded the Victoria Medal of Honour in 1953 and served as president of the Royal Horticultural Society from 1953 to 1961.Together, they had two children: Bowes-Lyon died at his sister Elizabeth's home, Birkhall, on the Balmoral estate, of a heart attack after suffering from hemiplegia on 13 September 1961, aged 59.