The third DIOMEDE was laid down by Messrs. Vickers and launched on 29th April 1919. She was completed on 24th April 1922 and commissioned on 2nd October the same year. Displacing 4,850 tons, with a top speed of 29 knots and with main armament of six 6 - inch guns and twelve torpedo tubes she joined the 5th Light Cruiser Squadron and served the next three years on the China Station.

In October 1925 the ship re-commissioned at Portsmouth for the New Zealand Division of the Royal Navy, in which she served until 1936. Between 1936 and the outbreak of the Second World War she was alternately in the Reserve Fleets Chatham, Nore and Devonport. She the joined the 7th Cruiser Squadron with the Home Fleet at Scapa Flow and spent the first five months of the war patrolling between Iceland and the Faeroes to intercept enemy blockade runners and surface raiders. From February 1940 to June 1942 DIOMEDE was deployed three times to the Pacific, serving and refitting in the Caribbean between each deployment.

She then returned to Rosyth for an extensive refit and modernisation, during which the torpedo tubes were removed and classrooms built in their place. The ship thus began a new career in August 1943 as part of the Training Group (Rosyth), day running in the Firth of Forth Areas for CW candidates’ Sea Training. She remained in this role until the end of the war and was finally scrapped at Dalmuir in May 1946.

DIOMEDE, a Leander Class Frigate, was launched by Lady Mills on 15th April, 1969, was completed by Messrs. YARROWS (Shipbuilders) Ltd at Scotstoun, Glasgow, on 1st April, 1971.

After acceptance trials, the ship was handed over to the Royal Navy and commissioned on 21st May 1971. She later joined the 3rd Frigate Squadron Captain J D E Fieldhouse the Captain and I/C of the Squadron

3 April 1971 The Diomede after acceptance trails where the Captain had to officially sign for the ship

Admiral John Fieldhouse