HMS M33 with HMS prince of wales behind, portsmouth naval base, england

HMS M33 is an M29-class monitor of the Royal Navy built in 1915. She saw active service in the Mediterranean during the First World War and in Russia during the Allied Intervention in 1919. She is one of only three surviving Royal Navy warships of the First World War and the only surviving ship from the Gallipoli Campaign.

Armed with a pair of 6-inch (152 mm) guns and having a shallow draught, M33 was designed for coastal bombardment. Commanded by Lieutenant Commander Preston-Thomas, her first active operation was the support of the British landings at Suvla during the Battle of Gallipoli in August 1915. She remained stationed at Gallipoli until the evacuation in January 1916. For the remainder of the war she served in the Mediterranean and was involved in the seizure of the Greek fleet at Salamis Bay on 1 September 1916.

M33 next saw service, along with five other monitors (M23, M25, M27, M31 and Humber), which were sent to Murmansk in 1919 to relieve the North Russian Expeditionary Force. In June, M33 moved to Archangel and her shallow draught enabled her to travel up the Dvina River to cover the withdrawal of British and White Russian forces.[1] At one time the river level was so low the ship's guns had to be removed and transported by cart. M25 and M27 were not so fortunate and had to be scuttled on 16 September 1919 after running aground. M33 safely returned to Chatham in October.