Reid and Sigrist R.S.3 Desford

The Reid and Sigrist R.S.3 Desford is a British twin-engined, propeller-driven, three-seat advanced trainer aircraft developed in the Second World War for postwar use. Although the R.S.3 was evaluated as a trainer, the type never entered production and was eventually rebuilt as the R.S.4 Bobsleigh as an experimental aircraft with the pilot in a prone position, seen as advantageous in minimising g-force effects in fighter aircraft.

Source: Wikipedia — Reid and Sigrist R.S.3 Desford (CC BY-SA 4.0)