Hawker P.1121 Staff having been unable to understand the concept of the multi-purpose functionality of the aircraft, which would become commonplace on later aircraft. While seeking a new project to take the place of the P.1121, Camm soon began work upon another new and radical aircraft design, designated as the Hawker Siddeley P.1127. The P.1127 would become the Hawker Siddeley Harrier, the first effective vertical take-off and landing (VTOL) combat aircraft. The Hawker P.1121 was envisioned as being one of the first British-built supersonic fighter aircraft, being projected to be capable of speeds of up to Mach 2.5. It was to have
McDonnell Douglas AV-8B Harrier II of funds for a replacement aircraft. Following the decommissioning of "Príncipe de Asturias" in February 2013, the sole naval platform from which Spanish Harrier IIs can operate is the amphibious assault ship . During its service with the USMC, the Harrier has had an accident rate three times that of the Corps' F/A-18s. , approximately 110 aircraft have been damaged beyond repair since the type entered service in 1985, the first accident occurring in March that year. The "Los Angeles Times" reported in 2003 that the Harrier family had the highest rate of major accidents among military aircraft in service