El Percival P. 56 Provost was a British basic trainer that was developed for the Royal Air Force in the 1950s as a replacement for the Percival Prentice. It was a low-wing monoplane with a fixed, tailwheel undercarriage and like the Prentice had a side-by-side seating arrangement. The Provost has the distinction of being the last piston-engine basic trainer aircraft to be operated by the RAF.
The Provost was later adapted to make use of a turbojet engine, producing the BAC Jet Provost. The type was withdrawn in the 1960s, in favour of its jet-powered successor.
Fuente: Percival Preboste en la Wikipedia