HMS Mastiff was a Thornycroft M-class destroyer which fought in the First World War as part of the Royal Navy.
[3][4] The ship was laid down 10 July 1913, launched 5 September 1914 and completed 12 November 1914.
On 24 January 1915, the ship took part in the Battle of Dogger Bank.
[1] In April 1918, the destroyer was assigned to 'Outer Patrol off Ostend' during the Zeebrugge Raid.
[1] A model of the ship is in the collections of the National Maritime Museum in Greenwich.