The two ships, renamed and in British service, were assigned to the Home Fleet and then the Channel Fleet; both vessels were sent to the Mediterranean Fleet in 1909, remaining there until 1912. "Swiftsure" became the flagship of the East Indies Station in 1913 and "Triumph" was sent to the China Station that year. "Swiftsure" escorted troopship convoys in the Indian Ocean at the start of the war, while "Triumph" joined the search for the East Asia Squadron and then participated in the Siege of Tsingtao. Both ships were transferred to the Dardanelles campaign in 1915, and "Triumph" was torpedoed and sunk by "U-21" two days before the latter also sank "Majestic". "Swiftsure" was reassigned to the 9th Cruiser Squadron in early 1916 for convoy operations in the Atlantic before being paid off in 1917 to free up crews for anti-submarine vessels. She was ultimately scrapped in 1920.