Her sister ship, , also played a role in the Battle of Heligoland Bight, and was then sent south to the Caribbean to intercept the German East Asia Squadron in case they used the Panama Canal. After the squadron was sunk at the Battle of the Falkland Islands in December 1914, "Princess Royal" rejoined the 1st Battlecruiser Squadron (BCS). During the Battle of Dogger Bank, she scored only a few hits, but one crippled the German armoured cruiser , which allowed the enemy vessel to be caught and sunk by the concentrated fire of the British battlecruisers. Shortly afterwards, "Princess Royal" became the flagship of the 1st BCS and participated in the Battle of Jutland. Both ships were present during the inconclusive Action of 19 August 1916.