 Magnificent left Chatham in March 1907 and was assigned to the Nore Division of the Home Fleet at the Nore. During this service, she temporarily was flagship of the Commander-in-Chief in November 1907 and underwent a refit at Chatham in 1908 during which she had new fire control systems installed and was converted to burn fuel oil. She served as the second flagship of the Home Fleet from August 1908 to January 1909. Magnificent was reduced to a nucleus crew in February 1909 as part of the commissioned reserve. On 24 March 1909, she became the flagship of the Vice Admiral, 3rd and 4th Divisions, Home Fleet, at the Nore. She was relieved as flagship on 1 March 1910 by the battleship Bulwark. On 27 September 1910, Magnificent was recommissioned into the Home Fleet to serve as a turret drill ship and stokers' training ship at Devonport. Her sternwalk was damaged in a collision in December 1910. She became tender to the turret drill ship Vivid in February 1911 and a seagoing gunnery training ship at Devonport on 14 May 1912. She was slightly damaged on 16 June 1913 when she ran aground in fog near Cawsand Bay. She recommissioned for 3rd Fleet service on 1 July 1913.
