Florence Angela Margaret Mortimer Barrett, MBE (née Mortimer; born 21 April 1932) is a British former world No. 1 tennis player. Mortimer won three Grand Slam singles titles: the 1955 French Championships, the 1958 Australian Championships, and 1961 Wimbledon Championships when she was 29 years old and partially deaf. She is married to the former player and broadcaster John Barrett. Following the death of Shirley Fry in 2021, Mortimer became the longest still surviving Wimbledon ladies singles champion.