HMS Teazer was an R-class destroyer which served with the Royal Navy during World War I. The destroyer was launched in April 1917 and, on trial, proved to be one of the fastest afloat, exceeding 40 knots. Attached to the Harwich Force, the ship supported the monitors Erebus, Terror and Marshal Soult in the bombardment of Zeebrugge in May 1918 and one of the final sorties of the war in the October following. The destroyer also took part in operations off the coast of Heligoland with a flying boat on a lighter, although the aircraft failed to take off. After the war, Teazer was kept in reserve until being sold to be broken up in 1931 following the signing of the London Naval Treaty that limited total destroyer tonnage.
HMS Tristram was a modified Admiralty R-class destroyer that served in the Royal Navy during the First World War. The Modified R class added attributes of the Yarrow Later M class to improve the capability of the ships to operate in bad weather. Launched in 1917, the destroyer was operational for just over four years. In 1917, Tristram joined the Grand Fleet and provided distant cover at the Second Battle of Heligoland Bight but did not engage with the enemy. After the armistice which ended the war, the destroyer was initially transferred to the Home Fleet before being placed in reserve in 1920 and then sold to be broken up in 1921.
HMS Umpire was a modified Admiralty R-class destroyer which served with the Royal Navy. The Modified R class added attributes of the Yarrow Later M class to improve the capability of the ships to operate in bad weather. Launched on 9 June 1917, the ship operated with the Grand Fleet during World War I as an escort to a squadron of light cruiser and took part in the Second Battle of Heligoland Bight. After the Armistice, the vessel continued to serve and gained fame when, after rescuing the charity's founder from drowning in 1924, the name of the first house opened by what would become Veterans Aid was named H10 after the destroyer's pennant number. Umpire was sold to be broken up in 1930.
HMS Medway was a Admiralty M-class destroyer which served with the Royal Navy during the First World War. The M class were an improvement on the previous Laforey-class, capable of higher speed. Originally laid down as HMS Redwing by J. Samuel White at East Cowes on the Isle of Wight, the vessel was renamed before being launched on 8 March 1916. The vessel was allocated to the Grand Fleet and served in the Second Battle of Heligoland Bight in support of the First Light Cruiser Squadron in their action against German light cruisers and minesweepers. During the action, the ship did not record any hits. After the War, the destroyer was placed in reserve and subsequently sold to be broken up on 9 May 1921.
HMS Llewellyn was a Laforey-class destroyer that served with the Royal Navy. Laid down on 14 December 1912 as HMS Picton, the ship was renamed on 30 September 1913 under an Admiralty order to become one of the first alphabetical class destroyers, being launched on 30 October. On commissioning, the vessel joined the Third Destroyer Flotilla and operated as part of the Harwich Force during the First World War. The destroyer took part in the Battle of Heligoland Bight, as well as undertaking anti-submarine patrols and escort duties. It was during one of these patrols on 4 December 1916 that the vessel unsuccessfully attacked the German submarine UB-18. On 17 March 1917, the destroyer was struck in the bow by a torpedo launched by a German torpedo boat while rescuing survivors from the sunk destroyer Paragon, but returned to port safely by steaming backwards. With the cessation of hostilities, the ship was placed in reserve. Although subsequently offered for sale to the Finnish Navy, Llewellyn was instead withdrawn from service and sold to be broken up on 18 March 1922.
HMS Peyton was a Admiralty M-class destroyer which served with the Royal Navy during the First World War. The M class were an improvement on the preceding L class, capable of higher speed. Launched on 2 May 1916, the vessel served in anti-submarine and escort duties based at Cobh in Ireland. The destroyer attacked the German submarine SM UB-23 and rescued crews from friendly merchant ships that had been sunk. After the end of the war, Peyton was placed in reserve and subsequently broken up on 9 May 1921.
HMS Portia was a Admiralty M-class destroyer which served with the Royal Navy during the First World War. The M class were an improvement on the previous L-class destroyer, capable of higher speed. Launched on 10 August 1916. Portia initially served with the Grand Fleet but was allocated to convoy escort duties in early 1917. The vessel was particularly active in anti-submarine warfare, although Portia never successful sank a submarine. After the Armistice of 11 November 1918, the ship was placed in reserve before being decommissioned and sold to be broken up on 9 May 1921.
HMS Obdurate was an Admiralty M-class destroyer which served with the Royal Navy during the First World War. The M class were an improvement on the previous L-class, capable of higher speed. Launched on 21 January 1916 by Scotts of Greenock, the vessel served as part of the Grand Fleet in the Battle of Jutland in May 1916. The destroyer formed part of the cover for the British battlecruisers and was involved in attacks on German battleships and destroyers, but recorded no hits. The destroyer was also part of attack by Zeppelin L 43 on Sydney and the distant cover for the Second Battle of Heligoland Bight, but received only minor damage from the German airship. After the armistice, Obdurate was assigned to the Local Defence Force at Nore and sold to be broken up on 9 May 1921.
HMS Pellew was a Admiralty M-class destroyer which served with the Royal Navy during the First World War. The M class were an improvement on the preceding L class, capable of higher speed. Launched on 18 April 1916, the vessel served with the Grand Fleet escorting convoys. The vessel was part of an unsuccessful attempt by the navy to trap the German submarines that had taken such a heavy toll on merchant shipping in December 1917. The action involved an eight-ship convoy consisting of four merchant vessels escorted by two armed trawlers and the sister ships Pellew and Partridge. Instead of submarines, four German destroyers attacked, sinking all but one member of the convoy and disappearing before the light cruisers which were to be the spring in the trap could arrive. Pellew, the sole survivor, took refuge in a Norwegian fjord. After the armistice that ended the war, the destroyer was placed in reserve and subsequently sold to be broken up on 9 May 1921.
HMS Penn was a Repeat Admiralty M-class destroyer which served with the Royal Navy during the First World War. The M class were an improvement on the preceding L class, capable of higher speed. The ship was named after William Penn, the father of the founder of Pennsylvania. Launched on 8 April 1916, the vessel served with the Grand Fleet forming part of the screen for the dreadnought battleships of the 1st Battle Squadron and escorting the aircraft carrier Furious in battle. The destroyer participated in the Actions of 19 August 1916 and 16 October 1917, as well as forming part of the distant support during the Second Battle of Heligoland Bight. Penn was also instrumental in rescuing the survivors from the light cruiser Nottingham, sunk by a German submarine. After the Armistice that ended the war, the destroyer was placed in reserve and subsequently sold to be broken up on 9 May 1921.
HMS Napier was a Repeat Admiralty M-class destroyer which served in the Royal Navy during the First World War. The M class were an improvement on the previous L-class destroyer, capable of higher speed. The vessel was launched on 27 November 1915 and joined the Grand Fleet. Napier had a varied war career, acting as part of the destroyer screen for the First Battle Squadron during the Second Battle of Heligoland Bight and searching for the survivors of losses like the armoured cruiser HMS Hampshire. The vessel was usually based at Scapa Flow but spent a brief time seconded to the Harwich Force in 1917. After the Armistice that marked the end of the First World War, Napier was placed in reserve before being decommissioned and sold to be broken up on 8 November 1921.
HMS Octavia was an Admiralty M-class destroyer which served in the Royal Navy during the First World War. The M class were an improvement on the previous L-class, capable of higher speed. The vessel was launched on 21 June 1916 and joined the Grand Fleet. Octavia joined the Thirteenth Destroyer Flotilla, which, in 1917, participated in a large anti-submarine warfare operation in the North Sea. The sortie led to three German submarines being sunk, although Octavia was not directly involved in these attacks. In 1918, the flotilla was involved in one of the final sorties of the Grand Fleet, but again the destroyer saw no action at the time. After the Armistice that marked the end of the First World War, Octavia was placed in reserve, decommissioned and, on 5 November 1921, sold to be broken up.
HMS Opportune was an Admiralty M-class destroyer which served in the Royal Navy during the First World War. The M class were an improvement on the previous L-class, capable of higher speed. The vessel was launched on 20 November 1915 and joined the Grand Fleet. Opportune spent much of the war involved in anti-submarine warfare. The ship took part in large patrols to seek out submarines which involved entire flotillas and also acted as an escort for convoys. After the Armistice that marked the end of the First World War, the destroyer was transferred to Portsmouth and placed in reserve. After a brief spell as a remote controlled target to test how warships responded to attacks by aircraft, Opportune was decommissioned and, on 7 December 1923, sold to be broken up.
HMS Oberon was a Repeat Admiralty M-class destroyer which served in the Royal Navy during the First World War. The M class were an improvement on the previous L-class, capable of higher speed. The vessel was launched in 1916 and joined the Grand Fleet. Oberon joined the Thirteenth Destroyer Flotilla which, in 1917, participated in a large anti-submarine warfare operation in the North Sea. The sortie led to three German submarines being sunk, although Oberon was not directly involved in these attacks. In 1918, the flotilla was involved in one of the final sorties of the Grand Fleet, but again the destroyer saw no action at the time. After the Armistice that marked the end of the First World War, Oberon was placed in reserve, decommissioned and, in 1921, sold to be broken up.
HMS Obedient was a Repeat Admiralty M-class destroyer which served with the Royal Navy during the First World War. The M class were an improvement on the preceding L class, capable of higher speed. Launched in 1915, the destroyer served with the Grand Fleet during the Battle of Jutland in 1916, helping sink the torpedo boat V48 and narrowiy missing the German battleships as they withdrew. Subsequently, Obedient took part in anti-submarine patrols, attacking U-70 in 1917. The conditions of service meant that the destroyer was soon worn out and, after the armistice that ended the war in 1918, Obedient was placed in reserve. Despite a service life of only five years, the vessel was decommissioned and, in 1921, sold to be broken up.
HMS Onslaught was a Admiralty M-class destroyer which served with the Royal Navy during the First World War. The M class were an improvement on the previous L-class, capable of higher speed. The vessel, launched in 1915, joined the Twelfth Destroyer Flotilla under the flotilla leader Faulknor. The ship saw action during the Battle of Jutland in May 1916, jointly sinking the German torpedo boat SMS V48 and launching the torpedo that sank the pre-dreadnought battleship Pommern, the only German battleship to be lost in the battle. Subsequently, the destroyer acted as an escort to other naval ships during the Action of 19 August 1916 and took part in anti-submarine operations. At the end of the war, Onslaught was withdrawn from service and, in 1921, sold to be broken up.
HMS Nepean was an Admiralty M-class destroyer which served in the Royal Navy during the First World War. The M class was an improvement on those of the preceding L class, capable of higher speed. The second Royal Navy vessel to be named after Sir Evan Nepean, and the first not in Australian service, the destroyer was launched in 1916 and joined the Thirteenth Destroyer Flotilla of the Grand Fleet. In 1917, Nepean formed part of the escort for the light cruisers Dublin and Sydney when they were attacked by the Zeppelin L 43 and the First Battlecruiser Squadron during the Second Battle of Heligoland Bight. Neither led to the warship being involved in any action with the enemy. The destroyer finished the war with the Fourth Destroyer Flotilla. After the Armistice, Nepean was placed in reserve before being sold to be broken up in 1921.
HMS Nonsuch was a Repeat Admiralty M-class destroyer that served in the Royal Navy during the First World War. The M class was an improvement on those of the preceding L class, capable of higher speed. Originally laid down as HMS Narcissus but renamed before being launched in 1915, Nonsuch joined the Twelfth Destroyer Flotilla of the Grand Fleet. During the Battle of Jutland in 1916, after being attacked by the light cruisers of the German High Seas Fleet, the warship rescued the damaged destroyer Acasta. The vessel formed part of the screen for the dreadnought battleships of the First Battle Squadron during the Second Battle of Heligoland Bight in 1917. In both actions, the destroyer reported no hits. After the Armistice that ended the war, Nonsuch was initially put in reserve and then sold in 1921 to be broken up.
HMS Noble was a Repeat Admiralty M-class destroyer that served in the Royal Navy during the First World War. The M class was an improvement on those of the preceding L class, capable of higher speed. Originally to be called Nisus, Noble was renamed before being launched in 1915. Joining the Twelfth Destroyer Flotilla of the Grand Fleet, the vessel took part in the Battle of Jutland in 1916, during which the warship unsuccessfully attacked the light cruisers of the German High Seas Fleet. In 1917, the destroyer formed part of the screen for the dreadnought battleships of the First Battle Squadron during the Second Battle of Heligoland Bight but again reported no hits. After the Armistice that ended the war, Noble was initially put in reserve and then sold in 1921 to be broken up.
HMS Prince was a Repeat Admiralty M-class destroyer that served in the Royal Navy during the First World War. The M class was an improvement on those of the preceding L class, capable of higher speed. Launched in 1916, Prince joined the Twelfth Destroyer Flotilla of the Grand Fleet. The destroyer assisted in the rescue of the crew of the flotilla leader Hoste in 1916, laying down fuel oil on the sea in an attempt to create a calm enough environment to evacuate the sinking ship. The operation was successful and all the sailors were saved. In 1917, the ship formed part of the destroyer screen for the First Battle Squadron during the Second Battle of Heligoland Bight but saw no action. After the Armistice that ended the war, Prince was initially put in reserve and then sold in 1921 to be broken up.
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