The Vickers Valiant was a British jet bomber developed in the 1950s. It was part of the V-bomber force, designed to carry nuclear weapons during the Cold War. The aircraft first flew in 1951 and entered service with the Royal Air Force in 1955. The Valiant was notable for its high speed and ability to operate at high altitudes. It had a distinctive delta wing design, which contributed to its performance. However, it was retired in 1965 due to structural issues and the changing needs of military aviation, making way for newer aircraft.