Peter James Scott Lumsden, CBE (20 February 1929 – 15 October 2017) was a British privateer motorsport competitor who gained renown between 1959 and 1965 racing at Le Mans, the Nürburgring, Silverstone & Goodwood before twice winning at Brands Hatch in his final season in 1965.

After winning the 1300 cc GT class in the Nürburgring 1000 km round of the World Sports Car Championship with co-driver Peter Riley, the pair took part in the prestigious Le Mans 24 Hours.

In 1960 Lumsden began his partnership with co-driver Peter Sargent at the Nürburgring 1000 Ks, finishing second in the 1300 cc GT class to the Team Elite entry for Alan Stacey and John Wagstaff.

Further testing followed in May at Brands Hatch followed by a sortie at Silverstone before the car was loaned back to Coundly and eventually sold to Jaguar Drivers Club chairman, David Harvey.

Key to the development of the Lister-Jaguar GT Prototype was the involvement of mechanic Brian Playford and engineer Samir Klat, both of whom would go on to play a vital part in the next stage of Lumsden's racing career.

On returning to competition in 1964, the car was timed at 168 mph on the Mulsanne straight during the Le Mans test weekend but failed to complete the race itself due to gearbox failure.