HMS Dunedin (I/D—93)
built by Armstrong Whitworth,laid down 5 November 1917, launched 19 November 1918, completed by Devonport Royal Dockyard October 1919.Transferred to Royal New Zealand Navy 1925 (returned to RN on NZ receipt of new Leander Class); torpedoed and sunk by the German U-boat U-124 off Saint Paul's Rock in the South Atlantic 24 November 1941.
HMS Diomede (I/D-92) (From Wiki)
Constructed at Vickers Armstrong, Barrow, she was constructed too late to take part in World War I and was consequently completed at the Royal Dockyard, Portsmouth, 22 February 1922. Upon commissioning Diomede joined the 5th Light Cruiser Squadron on the China Station in 1922. In 1925 she was transferred to the New Zealand Division of the Royal Navy at Devonport where she served until 1935, apart from a refit in 1929-1930. In 1931 she rendered assistance to the town of Napier, New Zealand after the devastating Hawkes Bay earthquake, supplying medical personnel, equipment, guards and firemen, along with her sister ship Dunedin.
Upon the notification that the two cruisers of the New Zealand Division were to be replaced by Leander class cruisers, in 1935 Diomede started her voyage home to Britain to be paid off into the reserve. En route the Abyssinian Crisis broke out and she was diverted to the 4th Light Cruiser Squadron, part of the East Indies Station based at Aden for possible action against the Italians. Upon relief by HMS Achilles on 31 March 1936 she was paid off and spent the next three years in the reserve fleet or as a troop ship.
With the growing likelihood of war, Diomede was reactivated. 3 September 1939 found her with the 7th Cruiser Squadron serving as part of the Home Fleet on Northern Patrol duties. Before the despatch of the 7th Cruiser Squadron to the Mediterranean in 1940 in light of the Italian threat, Diomede was attached to the 8th Cruiser Squadron on the America and West Indies Station on shipping protection and patrolling duty. On 8 December 1940 she chased the German blockade runner Idarwald from Tampico, Mexico. Before a capture could be effected the crew of the German freighter set it afire and scuttled it off Cabo Corrientes, Cuba. The US destroyer USS Sturtevant observed the proceedings.
In early 1942 Diomede joined the 9th Cruiser Squadron as part of the South Atlantic and West African Squadron. After more than a decade of steaming it was decided to retire her from front-line service and from 22 July 1942 to 24 September 1943 at Rosyth Dockyard she converted into a training ship. With the end of the war she was reduced to reserve. On 5 April 1946 she was sold for scrap to Arnott Young of Dalmuir and arrived there for breaking up on 5 May.