Sanderson also won gold medals in the javelin throw at three Commonwealth Games (1978, 1986 and 1990) and at the 1992 IAAF World Cup. She was runner-up at the 1978 European Athletics Championships, and competed in three world championships (1983, 1987, and 1997). She was AAAs National Champion ten times, UK National Champion three times. She set ten UK senior records and five Commonwealth records in the javelin, as well as records at both junior and masters levels.