The Valiant is a shoulder-wing bomber with compound swept wings and swept back tail surfaces, with a mid set variable-incidence tailplane. The Tricycle landing gear has two wheels on each unit, with the nose unit retracting rearwards, and the main units retracting outwards into the wings. The bomber was powered by four Rolls-Royce RA.28 Avon 204 jet engines, each with a power of 10,500 lb st (44.7 kN), which are mounted in the wing roots.