HMS Oakley was a Type II Hunt-class destroyer of the Royal Navy. She was originally to have been named Tickham; however, she was renamed after her sister ship Oakley was transferred to Poland and was renamed ORP Kujawiak (L72). She entered service in May 1943, carrying out convoy escort, patrol and anti-shipping attacks for most of the rest of the Second World War. She was adopted by the Civil community of Leighton Buzzard in Bedfordshire as part of Warship Week in 1942. In 1957, she was sold to the West German Navy, serving as a training ship for the German Naval Gunnery school until scrapped in 1972.

HMS Oakley was ordered from Yarrows on 20 December 1939, one of 16 Type II Hunt-class destroyers ordered from various shipbuilders on that date, (including two from Yarrows). The Hunts were meant to fill the Royal Navy's need for a large number of small destroyer-type vessels capable of both convoy escort and operations with the fleet. The Type II Hunts differed from the earlier ships in having increased beam in order to improve stability and carry the ships' originally intended armament.

The ship intended to be HMS Tickham was laid down at Yarrow's Scotstoun, Glasgow shipyard on 19 August 1940, with construction being badly delayed by German bombing of the shipyard. On 3 April 1941 it was agreed that the original Oakley, under construction by Vickers-Armstrong on the Tyne, would be transferred to the Polish Navy as the Kujawiak, with Tickham being renamed Oakley in her place. Oakley was launched on 15 January 1942 and completed on 7 May 1942.

Oakley was 264 feet 3 inches (80.54 m) long between perpendiculars and 280 feet (85.34 m) overall. The ship's beam was 31 feet 6 inches (9.60 m) and draught 7 feet 9 inches (2.36 m). Displacement was 1,050 long tons (1,070 t) standard and 1,490 long tons (1,510 t) under full load. Two Admiralty boilers raising steam at 300 pounds per square inch (2,100 kPa) and 620 °F (327 °C) fed Parsons single-reduction geared steam turbines that drove two propeller shafts, generating 19,000 shaft horsepower (14,000 kW) at 380 rpm. This gave a speed of 27 knots (50 km/h; 31 mph). 277 long tons (281 t) of oil were carried, giving a design range of 2,560 nautical miles (4,740 km; 2,950 mi) (although in service use, this dropped to 1,550 nautical miles (2,870 km; 1,780 mi)).

The ship's main gun armament was six 4 inch (102 mm) QF Mk XVI dual purpose (anti-ship and anti-aircraft) guns in three twin mounts, with one mount forward and two aft. Additional close-in anti-aircraft armament was provided by a quadruple 2-pounder "pom-pom" mount and two single Oerlikon 20 mm cannon mounted in the bridge wings. Power-operated twin 20 mm Oerlikon mounts replaced the single Oerlikons during the war. Up to 110 depth charges could be carried. The ship had a complement of 168 officers and men.

After rectification of defects found during the ship's sea trials, Oakley sailed for Scapa Flow in Orkney on 22 June 1942, and took part in escorting a minelaying operation and in a diversion operation intended to distract German attentions from the Arctic Convoy PQ 17. After completion of these operations, Oakley completed working up her crew, becoming a part of the Orkney and Shetland Command, where her main duties consisted of escorting convoys to and from the Faroe Islands. In September 1942, the Royal Navy sailed the next major supply convoy to the Soviet Union, Convoy PQ 18, and Oakley was again involved in support operations for the convoy. It was decided to set up a temporary refueling base for the convoy's escorts at Lowe Sound, Spitsbergen, with Oakley part of the escort for the oilers that carried out these refueling operations. On 17 November 1942, the westbound convoy QP 15 sailed from Arkhangelsk in Northern Russia, with Oakley joining the escort of the Loch Ewe bound convoy on 23 November, continuing with the convoy, which was heavily disrupted by storms, until it reached Scotland.

In early 1943, Oakley was allocated to service in the Mediterranean, and sailed as part of the escort of Algiers-bound convoy KMF 9, reaching Oran in Algeria on 16 February, where she joined the 59th Destroyer Division. Oakley's normal duties with the 59th Division consisted of convoy escort and patrol duties in the Western and Central Mediterranean. By the end of April 1943, Allied armies were closing in on German and Italian troops in Tunisia, and on 8 May Admiral Cunningham, commander of the British Mediterranean Fleet, ordered Operation Retribution, a blockade of Tunisian ports by Allied sea and air forces to stop any evacuation of Axis troops to Sicily, with 18 destroyers, including Oakley, forming part of the blockading force. On 9 May, Oakley and sister ship Bicester were operating off Cape Bon when, in a case of mistaken identity, the two destroyers were attacked by 18 Spitfire fighter aircraft, with Bicester receiving heavy damage from a near miss of a bomb.

On 8 July 1943, Oakley set out from Sfax in Tunisia as part of the escort of a convoy of 26 Landing Ship, Tanks carrying troops of the 51st (Highland) Division as part of the Allied invasion of Sicily. The convoy reached its assigned assault beach designated "Bark South", near Capo Passero at the South-east corner of Sicily on 10 July, with Oakley shelling Italian defences during the landings before returning to the duty of escorting transports between African ports and the invasion beaches. Oakley continued on escort duties in the Mediterranean for most of the rest of the year, but on 12 December, Oakley struck a submerged wreck at the entrance to Taranto harbor, seriously damaging the ship's hull and propellers.