Shamrock was one of thirty-three Admiralty S class destroyers ordered by the British Admiralty in June 1917 as part of the Twelfth War Construction Programme. The design was a development of the R class introduced at the same time as, and as a cheaper and faster complement to, the V and W class.[1]
Armament consisted of three QF 4-inch (102 mm) Mk IV guns on the ship's centreline.[3] One was mounted raised on the forecastle, one on a platform between the funnels and one aft.[4] The ship also mounted a single 40-millimetre (1.6 in) 2-pounder pom-pomanti-aircraft gun for air defence. Four 21-inch (533 mm) torpedo tubes were fitted in two twin rotating mounts aft.[3] The ship was designed to mount two additional 18-inch (457 mm) torpedo tubes either side of the superstructure but this required the forecastle plating to be cut away, making the vessel very wet, so they were removed.[5] The weight saved enabled the heavier Mark V 21-inch torpedo to be carried.[1] The ship had a complement of 90 officers and ratings.[6]
Although the war on the western front had finished, the escalating civil war in Russia continued. The United Kingdom decided to send units of the Royal Navy into the Baltic Sea to monitor the situation and to protect British interests. Soon into the campaign, it became clear that the Russians were planning to liberate the Baltic State of Latvia by integrating it into the new Soviet Union.[10] The fleet was therefore tasked with not simply helping to help organise the evacuation of German forces from the country but also support their war of independence. This was achieved on 14 November 1919.[11] Five days later, the destroyer arrived in Liepāja along with sister ships Serene, Sesame, Strenuous and Torbay in time to see peace restored.[12]
On 1 February 1934, Shamrock was recommissioned and rejoined the Local Defence Flotilla at Gibraltar.[17] The destroyer undertook another cruise between 6 and 30 April that year, visiting Huelva and Ceuta, as well as returning to Seville and Tangier.[18] In 1936, with tensions escalating in Spain, Shamrock, was joined by five other destroyers and three cruisers, just before the start of the Spanish Civil War. The destroyer was involved in evacuating British, French and American citizens from Malaga, and then other smaller settlements.[19][20] On 22 July, while undertaking these duties, the ship was bombed by Nationalist aircraft, but remained unharmed.[21] Soon after, Shamrock was taken out of service. The destroyer was chosen as one of twenty-two destroyers given to Thos. W. Ward of Sheffield in exchange for the linerRMS Majestic.[22] In consequence, on 23 November 1936, the ship was handed over to be broken up at Milford Haven.[23]
Bush, Steve; Warlow, Ben (2021). Pendant Numbers of the Royal Navy: A Complete History of the Allocation of Pendant Numbers to Royal Navy Warships & Auxiliaries. Barnsley: Seaforth Publishing. ISBN978-1-526793-78-2.
Colledge, J. J.; Warlow, Ben (2006). Ships of the Royal Navy: a complete record of all fighting ships of the Royal Navy from the 15th century to the present. London: Chatham. ISBN978-1-85367-566-9.
Dittmar, F.J.; Colledge, J.J. (1972). British Warships 1914–1919. Shepperton: Ian Allan. ISBN978-0-71100-380-4.
Dunn, Steve (2020). Battle in the Baltic: The Royal Navy and the Fight to Save Estonia & Latvia 1918-20. Barnsley: Seaforth Publishing. ISBN978-1-52674-273-5.