Diane Modahl, English runner
Diane Dolores Modahl (née Edwards, born 17 June 1966) is an English former middle distance runner who specialised in the 800 metres. She won the 800 m title at the 1990 Commonwealth Games. Her other notable results at 800 m include finishing second at the 1986 Commonwealth Games, third at the 1989 IAAF Grand Prix Final, fourth at the 1993 World Championships, and winning the European Cup in 1994. She also won six AAAs National 800 m titles and represented Great Britain at four Olympic Games (1988–2000), reaching the 800 m final in 1988.

In 1994, after a competition in Lisbon, her urine sample mimicked a positive reading for the performance-enhancing drug testosterone. Falsely accused of a doping offence, she professed her innocence and was later fully exonerated following an appeal. She returned to competition in 1996, and won a bronze medal at the 1998 Commonwealth Games. Her career best 800 m time of 1:58.65 in 1990, ranks her 11th on the UK all-time list.