The Battle Cruiser Fleet, (BCF),[1] later known as Battle Cruiser Force, a naval formation of fast battlecruisers of the Royal Navy, operated from 1915 to 1919.

The Fleet was formed on 11 February 1915 when the Admiralty ordered the deployment of its faster Battlecruiser squadrons to the Rosyth Command[2] and grouped them together as the new Battle Cruiser Fleet.

[3] The name 'Fleet' remained until 1916 although it was officially subordinate to the Commander-in-Chief, Grand Fleet.

It also included two light cruiser squadrons and two destroyer flotillas, in addition the new 5th Battle Squadron that included the new fast Queen Elizabeth-class battleships operated with the fleet.

On 29 November 1916 it was renamed Battle Cruiser Force.