"Implacable" was recommissioned on 16 January 1952 as the flagship of the Home Fleet Training Squadron. On 13 February she arrived at Dover to serve as the port's guard ship before and after the state funeral of King George VI, to salute royalty and heads of state arriving by sea. After its conclusion, the ship sailed for the western Mediterranean to rendezvous with her sister for exercises. In June the two sisters represented a fast troop convoy being attacked by aircraft during an air defence exercise. They visited Copenhagen in the next month before returning home. "Implacable" sailed for Gibraltar on 25 September and made a port visit to Lisbon, Portugal, before returning to Devonport for a refit. On 16 November she had an oil fire in her galley that damaged her electrical wiring badly enough to require extending her refit to 20 January 1953. She spent most of February and March in the western Mediterranean together with her sister, participating in exercises before sailing to Southampton for a brief refit.