 In 1955 Davidge was runner-up partnering J A Gobbo in the Silver Goblets at Henley Royal Regatta to the Russians Buldakov and Ivanov.In 1956 he competed for Great Britain rowing at the 1956 Summer Olympics where he was a member of the unplaced eight.He won the Silver Goblets at Henley in 1957 and 1958, partnering Tony Leadley.