[1] In 1953 Diamond took part in the Fleet Review to celebrate the Coronation of Queen Elizabeth II.

[3] On 29 September 1953, she sustained severe bow damage in a collision with the cruiser Swiftsure during Exercise Mariner, held off the coast of Iceland.

In 1964 she was involved in another collision, this time with the frigate Salisbury, in the English Channel during a naval demonstration.

[6] In 1970, she became one of two Harbour Training Ships moored alongside Priddy's Hard jetty in Gosport and attached to the Marine Engineering School at nearby HMS Sultan and remained in this role until replaced by HMS Londonderry.

For most of this time, her steam plant remained maintained and useable for watchkeeping familiarisation purposes.