She was born on 29 March 1930, the daughter of Anthony Seymour Bellville (1902–1970) and Audrey Dorothy C Kidston (1906–1997), who was the younger sister of the racing driver and aviator
Glen Kidston (1899–1931). In 1940, her mother Audrey married Hon. Peter Pleydell-Bouverie, son of
Jacob Pleydell-Bouverie, 6th Earl of Radnor. ==Personal life==