Prix Libre event. Formula One Thompson entered a works Connaught for the 1952 RAC British Grand Prix with a Lea-Francis engine and qualified the car ninth on the grid. In the race he made up a position when Gordini driver Robert Manzon was forced to retire with a clutch problem. He managed to finish in fifth place, three laps behind race winner Alberto Ascari and ahead of 1950 World Drivers' Champion Giuseppe Farina, and behind teammate Dennis Poore. After Formula One Thompson participated in the 1953 Les 24 Heures du Mans in an Aston Martin DB3S with Poore with the pairing retiring with ignition failure after 182 laps. Parnell and Thompson took part in the Goodwood Nine Hours with Parnell driving in the first stint and Thompson for the next 70 laps. Parnell took over after 77 laps and suffered a puncture 22 laps later. After pitting Parnell drove another 53 laps with Thompson taking over at 21:45. After problems with the clutch, Thompson rejoined with 2 hours and 15 minutes remaining. The pairing eventually won the race. They both took part in that year's Tourist Trophy where they finished second. Thompson took a second-place finish at Thruxton and drove an Aston Martin DB2 to fifth in the Goodwood Easter Handicap and took sixth in a Libre race driving an Aston Martin DB3, but was forced to retire from the 6-hour relay at Silverstone. He took part in single seater races driving a Connaught A-Type to two victories in Snetterton and second in a Libre race in the Formula Two Championship. In 1954 Thompson reduced his commitment in the national motor racing scene. He spent the year driving an Aston Martin DB2 and contested the Les 24 Heures du Mans in a Lagonda DP115 with Poore. The pairing retired following a crash after 25 laps. In 1955 Thompson announced his retirement from motor racing due to pressure from his job and drove in his final Les 24 Heures du Mans where he retired with engine problems after 60 laps. He also drove in the Goodwood Nine Hours in a Connaught-Lea-Francis ALSR pairing with Kenneth McAlpine, finishing 16th. Thompson's final competitive race was in 1956 at the CUAC Speed Trials, driving a 498cc Jason to second in his class. After motorsport After announcing his retirement from motor racing Thompson concentrated on his work at Lloyd's. He resigned his job in the