| Unit Name: | 2nd Battlecruiser Squadron |
| Dates: | 1915–1919 |
| Country: | United Kingdom |
| Allegiance: | British Empire |
| Branch: | Royal Navy |
| Notable Commanders: | Rear Admiral W. C. Pakenham |
The 2nd Battlecruiser Squadron was a Royal Navy squadron of battlecruisers that saw service as part of the Grand Fleet during the First World War.
In August 1914, the 2nd Battlecruiser Squadron was in the Mediterranean, and consisted of:[1]
On 15 January 1915, became flagship of the 2nd BCS. She was replaced as flagship by the Australian battlecruiser on 8 February 1915.
With the transfer of HMS Inflexible and Indomitable to the newly created 3rd Battlecruiser Squadron during 1915, the squadron was left with three ships, namely HMS New Zealand and Indefatigable, and HMAS Australia.
HMAS Australia was damaged in collision with HMS New Zealand on 22 April 1916, and did not participate in the Battle of Jutland on 31 May 1916. The 2nd BCS therefore consisted of:[2]
HMS New Zealand sustained light damage during the engagement; however, HMS Indefatigable was sunk by the German battlecruiser .
With the loss of three battlecruisers at Jutland, the Royal Navy reverted to two Battlecruiser squadrons. For the remainder of the war, the squadron comprised:[1]
Post holders included:[3]
| Rank | Flag | Name | Term | Notes | |
|---|---|---|---|---|---|
| Rear-Admiral Commanding, 2nd Battle Cruiser Squadron | |||||
| 1 | Rear-Admiral | January–February 1915 | |||
| 2 | Rear-Admiral | Sir George Edwin Patey | February–March 1915 | ||
| 3 | Rear-Admiral | 1 March 1915 – December 1916 | |||
| 4 | Rear-Admiral | December 1916 – September 1918 | |||
| 5 | Rear-Admiral | September 1918 – March 1919 | |||
| 6 | Rear-Admiral | Henry Oliver | 14 March 1918 – March 1919 | ||