Myrmidon was commissioned in August 1901 to serve on the
Mediterranean Station. Commander
Cecil Lambert was appointed in command in January 1902, and in September that year she was part of a squadron visiting
Nauplia and
Souda Bay off
Crete for combined manoeuvres of the Mediterranean and Channel Fleets, during which she was declared as being sunk by the umpires of the exercise when she engaged two destroyers of an opposing fleet, mistaking them for torpedo boats. In February 1903 she again left Malta for
Platanias and Greek waters, accompanied by
HMS Illustrious,
HMS London and
HMS Caesar.
Myrmidon returned from the Mediterranean in 1905 and then served with the
Atlantic Fleet for a year. In September 1907,
Myrmidon, based at
Portsmouth as part of the
First Destroyer Flotilla of the
Channel Fleet, started a refit at
Sheerness dockyard, with her boilers being retubed and her hull and machinery refurbished, with the refit completing in April 1908.
Mrymidon was a member of the
Fourth Destroyer Flotilla, based at Portsmouth, in 1910 and remained part of that Flotilla in 1912. On 30 August 1912, the Admiralty directed all destroyers were to be grouped into classes designated by letters based on contract speed and appearance. As a four-funneled 30-knotter destroyer,
Myrmidon was assigned to the
B Class. In 1912, older destroyers were organised into Patrol Flotillas, with
Myrmidon being part of the 6th Flotilla, based at Portsmouth, in March 1913. She remained part of the 6th Flotilla in July 1914, on the eve of the outbreak of the
First World War.
First World War The 6th Flotilla mobilised and transferred to its war station at Dover (as part of the
Dover Patrol) on 31 July–1 August 1914. The Flotilla's role was to prevent German warships from passing into the
English Channel.
Myrmidon was operating off the Belgian coast on 24 October 1914 when she reported being attacked by a submarine.
Myrmidon remained part of the 6th Flotilla at the beginning of March 1917.
Myrmidon sank after a collision with the
merchant ship Hamborn on 26 March 1917 off
Dungeness. Her crew were rescued by and SS
Tambour, with the loss of one life. ==Pennant numbers==