Long before the motor industry invented terms like platform-sharing and scalable architectures, Triumph was already doing it in the 1960s with the Spitfire (green car) and six-cylinder GT6 (yellow car), which were based on the Herald/Vitesse, a process facilitated by the Herald’s separate chassis and bolt-on panels, which made it easier to offer different body types. Photos taken at The Great British Car Journey in 2023. Back on the saloons tomorrow.