Which British athlete has appeared in the most Summer Olympic Games?

Nicholas David Skelton, CBE (born 30 December 1957, Bedworth, Warwickshire) is a former British equestrian who competed in show jumping. He retired at the age of 59 years old, on 5 April 2017. He began riding at age 18 months and in 1975 took two team silvers and an individual gold at the Junior European Championships. He has competed numerous times at the European Show Jumping Championships, winning three golds, three silvers and three bronzes both individually and with the British team over a 26-year time period. In 1980 he competed in the Alternative Olympics where he helped the British team to a silver medal. He currently holds the British Show Jumping High Jump record, which he set in 1978.

In 2012, at the age of 54, Skelton won the Olympic gold medal as part of the winning Great Britain team. In 2016, at the age of 58, Skelton won the Individual Olympic gold medal at his seventh Olympic Games which is the British record for appearances in the Summer Olympics.