The sixth HMS Bulwark of the Royal Navy was a 22,000 ton Centaur-class light fleet aircraft carrier. Initially commissioned as a light aircraft carrier in 1954, the ship was converted into a commando carrier in 1958 and recommissioned as such in 1960. Bulwark remained in this capacity until 1979 following failed efforts to sell the ship, Bulwark re-entered service as an anti-submarine warfare carrier and remained as such until being decommissioned in 1981. The ship was scrapped in 1984.

The Centaur class aircraft carrier was the final iteration of the 1942 Design Light Fleet Carrier developed by the United Kingdom for the Royal Navy during the Second World War. They were designed in 1943 to operate higher-performance aircraft than the preceding Majestic-class aircraft carrier. Four ships were laid down in 1944-1945 and completed in 1953-1959. Rapid developments in carrier warfare and technology overtook the ships even as they were under construction, and the associated costs of modernization led to ships being completed to different specifications. Only the last ship, HMS Hermes (R12), was fitted as a modern fixed-wing carrier; she was also the last of the class to retire in 2017 as INS Viraat.