The following month, she was relieved and sailed for England, and was reduced to reserve at Sheerness upon her arrival on 26 April as she was thoroughly obsolete in comparison to the latest dreadnoughts. "Superb" became a gunnery training ship in September, until she was relieved of that duty in December. The ship was listed for disposal on 26 March 1920 at the Nore and was used for gunnery experiments in December. Beginning in May 1922, she was used as a target ship for the next several months. In December, she was sold to Stanlee Shipbreaking Company, but was not towed to Dover for demolition until 7 April 1923.