Derek Swithin Allhusen was born in London and educated at Eton and Trinity College, Cambridge. In 1937 he married The Hon Claudia Betterton. He served throughout the Second World War with 9th Queen's Royal Lancers, and the 24th Lancers (December 1940-September 1943) being awarded the American Silver Star in 1944 with the 9th Lancers.[1][2]
On returning from Germany he brought back two horses with him and settled in Claxton, Norfolk. He rode one of the horses, Laura when representing Britain in the pentathlon at the 1948 Winter Olympic Games. He eventually took up eventing in 1955, riding Laura's daughter Laurien on two European Championship teams, winning a team gold medal in 1957, then team silver and individual bronze in 1959. In 1961 he bought Irish-bred Lochinvar and rode her in two winning European Championship teams (in 1967 and 1969) as well as the gold and silver at the 1968 Summer Olympics. He was offered appointment as an MBE for his achievements but declined it; feeling his team-mates Richard Meade, Jane Bullen and Reuben Jones also deserved recognition.
^"Allhusen, Derek S."U.S. Army Awards of the Silver Star for Conspicuous Gallantry in Action During WORLD WAR II. HomeofHeroes.com. Archived from the original on 7 June 2008. Retrieved 13 December 2007.