Osgerby represented Great Britain at two consecutive
Summer Olympics, starting in 1980. She also represented Great Britain at the World Championships in 1978 and 1982, Commonwealth Games 1978 and 1982, European Championships 1981 and 1983, World Cup 1979. Osgerby became the British women's team captain in 1982 and held that position for two years until retiring after the 1984 Los Angeles Olympic Games suffering from an ongoing injury of
tendonitis in both shoulders. At her Olympic debut in Moscow she won the silver medal as a member of the British women's team in the 4×100-metre medley relay, alongside
June Croft,
Helen Jameson, and
Margaret Kelly. She is the twin sister of
Janet Osgerby, who competed as a swimmer at the
1980 Summer Olympics and became the first identical twins to appear in the same Olympic final, gaining a place in the Guinness Book of World Records. She represented
England in the butterfly events, at the
1978 Commonwealth Games in
Edmonton,
Alberta,
Canada. Four years later she represented
England and won a
bronze medal in the 200 metres butterfly and a
silver medal in the 4 x 100 metres medley relay, at the
1982 Commonwealth Games in
Brisbane,
Queensland,
Australia. She also won the ASA National Championship title in the
100 metres butterfly (1980, 1982, 1983) and the title in the
200 metres butterfly (1980, 1981, 1983). ==Personal life==