Margarita Evelyn Lumb was born in London in 1912 to Charles Fletcher Lumb and Margarita Johnson. Her father was a businessman and inventor; her mother was from Cuba. She was one of five children.
As a squash player she won the British Open five times in a row from 1935-39. She won all five finals in straight sets. She was also the runner-up at the championship in 1934, when she lost to Susan Noel.
As a tennis player, Lumb participated in the British Wightman Cup team in 1937 and 1938. She was a finalist in the 1937 All England Plate tournament, a tennis competition held at the Wimbledon Championships which consisted of players who were defeated in the first or second rounds of the singles competition. She lost the final in straight sets to Freda James. Lumb was the runner-up at the 1938 German Championships singles event, losing the final in straight sets to defending champion Hilde Sperling.
- "Sport: Tennis". Time. August 30, 1937. Retrieved 2009-12-22.
- "Obituaries: Margot Gordon". The Times (66107). 24 January 1998. p. 25. Retrieved 9 October 2018 – via GALE Group.
- Lumb, Margarita E. (September 1912). "Entry of Birth". freebmd.org.uk. Volume: 2a. Kingston. p. 916. Retrieved 8 October 2018.
- British Open Men's and Women's Champions Archived 2010-01-16 at the Wayback Machine
- British Open Hall of Fame Archived 2008-10-13 at the Wayback Machine
- "USSRA National Hardball Championships - Historical Data ( derived from USSRA records )". Squashtalk.com. Retrieved 2008-12-30.
- "German Titles". The Scotsman. 18 July 1938. p. 7 – via British Newspaper Archive.
- "Archive - Draws Archive : Bernice Lumb Doubles History Match History - 2015 Wimbledon Championships Website - Official Site by IBM". 2017.wimbledon.com. Retrieved 2018-10-09.
- "Margot Lumb In Last 16". Leicester Mercury. 21 February 1950. Retrieved 9 October 2018 – via British Newspaper Archive.
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