Moorcroft made his senior debut for Great Britain in 1973 and competed in his first
Olympic Games in Montreal 1976, placing seventh in the 1,500-metre final. He won gold in the
1978 Commonwealth Games in Edmonton at 1500 metres. Just four weeks later, he won the bronze medal at the same distance in the
European Athletics Championships in Prague. In the
1980 Moscow Olympics, he suffered from stomach problems and was eliminated in the 5,000-metres semifinals. Moorcroft had a remarkable season in 1982, where he broke the 5,000 m World Record by 5.79 seconds (without the use of pace-making). His time of 13:00.41 set at the
Bislett Games in Oslo stood for three years until broken by
Saïd Aouita (though it remained a
British record until 2010 and a European record until 1997). He remains the last non-African to set a 5,000 m world record. In the 1982 running season, he set a personal record in most distances, but probably ran too many races or for some other reason lost his peak shape before the
European Athletics Championships in Athens. There he took the bronze medal at 5,000 metres, losing to West Germany's
Thomas Wessinghage and East Germany's
Werner Schildhauer. The same year, he won gold in the
1982 Commonwealth Games in Brisbane over 5,000 m, he broke the
European and
British 3,000 m record with a time of 7:32.79 (less than a second off Henry Rono's 7:32.1 world record) and he demonstrated his lower end range by recording 1:46.64 for 800 m and 3:49.34 for the mile. His 3,000 m time remained a British record until it was broken by
Mo Farah on 5 June 2016. He competed in his third and final
Olympic Games in Los Angeles in 1984, however, suffering from a groin injury, he placed only 14th in the 5,000 metres final. He continued to compete for Britain internationally until the late 1980s. Following his retirement from top-level competition, he continued running and his time of 4:02.53 over
a mile in
Belfast in 1993 was at the time a world masters record for the 40+ age group. == Broadcasting and charity work ==