HMS Bristol (D23) was a Type 82 destroyer, the only vessel of her class to be built for the Royal Navy. Bristol was intended to be the first of a class of large destroyers to escort the CVA-01 aircraft carriers projected to come into service in the early 1970s, but the rest of the class and the CVA-01 carriers were cancelled as a result of the 1966 Defence White Paper which cut defence spending.

Following a long career that included the Falklands War, she was converted into a training ship in 1987. While part of the Dartmouth training squadron, she suffered a boiler explosion in 1991 that damaged the vessel beyond economical repair. No longer having enough value to be sold to another navy, she became a Harbour Training ship at HMS Excellent. She was decommissioned in Portsmouth on 28 October 2020, and her ship's bell was given to the Lord Mayor's Chapel in Bristol where it can be seen when the chapel is open.

The CVA-01 fleet aircraft carrier was designed to replace the World War II vintage aircraft carriers of the Royal Navy. The first plans were for two carriers and to protect these carriers four new Type 82 area air defence destroyers were to be built. In 1963, the Minister of Defence Peter Thorneycroft, announced in Parliament that one new aircraft carrier would be built, at an estimated cost of £56 million. However, a change of government and competition from the RAF (the RAF and Navy were both expected to use the Hawker P.1154 supersonic V/STOL aircraft, a larger version of the Hawker Siddeley Harrier) saw the project being cancelled in the 1966 Defence White Paper. This eliminated the requirement for the Type 82 class destroyer. However, one vessel of the original four was ordered on 4 October 1966 for use as a testbed for new technologies. HMS Bristol was launched in 1969, with four new weapons and electronics systems.

Bristol's hull was laid down by Swan Hunter & Tyne Shipbuilders Ltd on 15 November 1967. She was launched on 30 June 1969, accepted into service on 15 December 1972 and then commissioned on 31 March 1973. Her estimated building cost was £24,217,000.

Bristol saw a number of new systems introduced into the Navy, including the Sea Dart anti-aircraft and Ikara anti-submarine missile systems and was the first Royal Navy ship to carry the 4.5 inch (113 mm) Mk 8 gun. Another addition to the fleet was the new advanced Action Data Automated Weapons System Mk.2 (ADAWS-2), a computer system designed to coordinate the ship's weapons and sensors. ADAWS-2 was a large advance on the rudimentary action information system of its predecessor the County-class destroyers, which was heavily reliant on manual data input.

The Sea Dart (GWS 30) system comprised a twin-arm launcher on the quarterdeck with a pair of radar Type 909 target illumination sets, an improvement over the single radar Type 901 set of the County design. The second weapon system was the Australian Ikara anti-submarine weapon. Ikara was a rocket-powered carrier that could deliver a small homing torpedo out to 10 miles (16 km) from the ship. The Ikara was complemented by a Mark 10 Limbo anti-submarine mortar.

The single 4.5 inch (113 mm) Mark 8 gun was not intended as an anti-aircraft weapon, and as such had an elevation of only 55°. The weapon was designed specifically for reliability over rate of fire, allowing only a single mounting to be shipped, and the comparatively low rate of fire of 25 rounds per minute was ample for the intended anti-ship and shore-bombardment roles. Bristol, although capable of landing a Westland Wasp helicopter on the quarterdeck, lacked a hangar and aviation facilities and thus had to rely on external air support.

The role which Bristol was built for never materialised, and she consequently spent most of her service in the 1970s trialling and building up experience using new weapons and computer systems. A major boiler fire in 1974 destroyed the steam plant however Bristol was able to operate for a further three years using only her gas plant, demonstrating its flexibility and utility. The steam plant was repaired in 1976. In 1979 she was fitted out for frontline service with ECM, Corvus countermeasures launchers and a pair of World War II-era Oerlikon 20 mm cannon. During this refit the Limbo weapon was removed; its well was later used as a makeshift swimming pool.