The Boulton Paul P.115 was a design for a primary trainer to replace the Tiger Moth and Percival Prentice.
Several attempts had been made to replace the Tiger Moth. Specification T.23/43 had been issued with this in mind, for which Boulton Paul had submitted the low wing P.106. This design had been rejected in favour of the Percival Prentice, but this wasn't a successful aircraft. The Tiger Moth was retained for the early stages of basic training, while the Prentice was soon replaced by the Percival Proctor.
Specification T.8/48 was issued in an attempt to find an aircraft to replace the Tiger Moth and the Prentice. Boulton Paul put forward two designs, the P.115 and P.116. The P.115 was powered by Gipsy Queen 71 engine, a supercharged 400hp engine. This was expected to have a top speed of 160mph at 5,000ft, and a cruising speed of 141mph.
In the end the contract went to the Percival Provost, after competitive trials between that design and the Handley Page H.P.R.2.