During the early 1950s, Saunders-Roe worked on a new fighter design, designated "Project P.121", that featured skis aircraft publication "Flight" referred to it as the "Saunders-Roe Hydroski" with the aim of bringing its performance closer to that of land-based aircraft. By adopting hydroskis and dispensing with the hull approach of the SR.A/1, no concessions to hydrodynamic requirements were imposed upon the fuselage. On 29 January 1955, the company decided not to proceed with the construction of a prototype, the proposal having not attracted any official support.