New British Trainer Aircraft In Service -- "Balliol" trainer planes from a flying training school practice formation flying.The new British "Balliol" T.2 trainer plane is now superceding the Harvard as the advance single pistoned engined trainer of the Royal Air Force. The machine is fitted with a Rolls-Royce Merlin engine and instructor and pupil sit side by side. January 26, 1953. (Photo by Sport & General Press Agency, Limited).