HMS Trenchant was a modified Admiralty R-class destroyer which served with the Royal Navy. The vessel was the first of the modified design. Launched in 1916, the ship operated with the Grand Fleet during the First World War. The vessel was involved in escorting convoys and attacking German submarines. After the war, Trenchant was attacked by Republican forces during the Irish War of Independence but suffered little damage. The vessel was retired and sold to be broken up on 15 November 1928. The subsequent S-class are sometimes called Modified Trenchant class.
HMS Sorceress was an R-class destroyer which served with the Royal Navy during World War I. Launched on 29 August 1916, the vessel operated as part of the Grand Fleet until it was disbanded in 1919. In 1917, the ship took part in action against the German Sixth Destroyer Flotilla and was one of those credited with bounty for the German auxiliary cruiser Konprinz Willhelm. The destroyer was sold to be broken up on 29 April 1927.
HMS Simoom was an R-class destroyer which served with the Royal Navy during World War I. Launched on 30 October 1916, the vessel operated as part of the Harwich Force until torpedoed by the German destroyer S50 on 23 January 1917. The ship's magazine exploded and 47 people died. The name was reused by the first S-class destroyer, Simoom, launched on 26 January 1918.
HMS Sarpedon was an R-class destroyer which served with the Royal Navy. The R class were a development of the preceding M-class, but differed in having geared turbines and other design changes. Launched in June 1916, the vessel escorted convoys that sailed between Scotland and Scandinavia in the First World War. After the war, the ship was allocated to local defence at Nore. However, in 1923, the Navy decided to retire many of the older vessels and Sarpedon was retired and was sold to be broken up on 23 June 1926.
HMS Nereus was a Admiralty M-class destroyer which served with the Royal Navy during the First World War. Launched in 1916, the vessel served with the Grand Fleet until the end of the conflict. The vessel operated as part for Thirteenth Destroyer Flotilla in support of convoy operations. In 1918, the flotilla took part in one of the last sorties of the war, although the British and German fleets did not meet and the destroyer returned without seeing any action. After the conflict, the destroyer was worn out by the demands of high speed operation in poor weather. Nereus was decommissioned and sold to be broken up in 1921 after less than six years service.
HMS Rigorous was an R-class destroyer which served with the Royal Navy during World War I. Launched on 30 September 1916, the vessel operated as part of the Grand Fleet, operating as part of destroyer flotillas hunting German ships that were attacking convoys. One flotilla was successful in destroying a Q ship in 1917. After the War, the destroyer was given a reduced complement and was sold to be broken up on 5 November 1926.
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 Plucky 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 April 1916 by Scotts of Greenock, the vessel served as part of the Grand Fleet, spending most of the war based out of Plymouth, apart from a brief sojourn working from the Irish port of Buncrana. Plucky was mainly involved in anti-submarine warfare and escorting the merchant ships that made up the convoys travelling to and from England, colliding with one, the collier Mervin in February 1917. The merchant vessel was unharmed, but the subsequent explosion but the destroyer temporarily out of action. After armistice, the destroyer was redeployed to Portsmouth until being decommissioned 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 Peregrine was a Admiralty M-class destroyer that 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 29 May 1916, the vessel served with the Grand Fleet, focusing on anti-submarine warfare. In 1917, the destroyer was involved in the search for UC-65 after the submarine had sunk the protected cruiser Ariadne. In 1918, the ship participated in one of the final sorties of the war, although this did not lead to a confrontation with the German High Seas Fleet. 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 Marne was an Admiralty M-class destroyer which served with the Royal Navy during the First World War. The M class was an improvement on the preceding L class, capable of higher speed. The ship, the first Royal Navy vessel to be named after the River Marne, was launched in 1915. For much of the war, the destroyer escorted merchant ships in convoys and Royal Navy warships, but was also involved in the rescue of crew from the battleship HMS King Edward VII in 1916. The destroyer also took part in the Battle of Jutland as part of the shield for the British battleships and engaged with the German light cruiser force with torpedoes, although all missed. In 1918, the destroyer, along with sister ships Milbrook and Pigeon, sank the German submarine UB-124. After the armistice, Marne was placed in reserve before being decommissioned and, in 1921, sold to be broken up.
HMS Orpheus 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 on 17 June 1916 and joined the Grand Fleet. Orpheus spent much of the war undertaking anti-submarine warfare patrols in the North Sea and escorting convoys across the Atlantic Ocean. In 1917, the destroyer was involved in a friendly fire incident with the British submarine J1. After the Armistice that marked the end of the First World War, the destroyer joined the Home Fleet. However, this role did not last long and the destroyer was deemed superfluous to requirements. Soon after, Orpheus was placed in reserve, decommissioned and, on 1 November 1921, sold to be broken up.
HMS Orford 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 19 April 1916 and joined the Grand Fleet. Orford spent much of the war undertaking anti-submarine warfare patrols and escorting convoys across the Atlantic Ocean. Although based at Scapa Flow, the destroyer ranged far, often operating off the coast of Cornwall and even having a temporary transfer to Buncrana in Ireland in 1917. In 1918, the destroyer took part in one of the final sorties of the Grand Fleet, but saw no action. After the Armistice that marked the end of the First World War, Orford was placed in reserve, decommissioned and, on 31 October 1921, sold to be broken up.
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 Nonpareil 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. Nonpareil had a largely uneventful war. Joining the Fourteenth Destroyer Flotilla of the Grand Fleet in 1916, the vessel was soon involved in an exercise that involved most of the dreadnoughts of the First and Third Battle Squadrons but did not take part in any fleet actions. In 1917, the destroyer was a participant in anti-ship and anti-submarine patrols, but these were unsuccessful and the ship did not engage any enemy warships. After the Armistice that ended the war, Nonpareil was initially put in reserve and then sold in 1921 to be broken up.
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