HMS Diana was a D-class destroyer of the Royal Navy. Ordered in 1931, the ship was constructed by Palmers Shipbuilding and Iron Company, and entered naval service in 1932. Diana was initially assigned to the Mediterranean Fleet before she was transferred to the China Station in early 1935. She was temporarily deployed in the Red Sea during late 1935 during the Abyssinia Crisis, before returning to her duty station where she remained until mid-1939. Diana was transferred back to the Mediterranean Fleet just before the Second World War began in September 1939. She served with the Home Fleet during the Norwegian Campaign. The ship was transferred to the Royal Canadian Navy in 1940 and renamed HMCS Margaree. She served for just over a month with the Canadians before being sunk in a collision with a large freighter she was escorting on 22 October 1940.

The C and D class was a group of 14 destroyers built for the Royal Navy in the early 1930s. As in previous years, it was originally intended to order a complete flotilla comprising eight destroyers—plus a flotilla leader as the ninth unit—in each year. However, only four ships—plus a leader—were ordered under the 1929–1930 Programme as the C class. The other four ships planned for the C class were never ordered as an economy measure and disarmament gesture by the Labour government of Ramsay MacDonald. A complete flotilla—the 'D' class—was ordered under the 1930–1931 Programme.