 The sisters remained with their squadrons until 1917 when they were converted into minelayers, Bellona in May and Boadicea in October, Bellona replacing her sister in the 2nd Battle Squadron that month. After her conversion, Boadicea was assigned to the 4th Battle Squadron in January 1918 and neither ship was reassigned before the end of the war. They laid mines at the entrance to the Kattegat on the nights of 18 / 19 and 24 / 25 February 1918 and both made several other sorties to lay their mines before the end of the war. They were placed in reserve after the war and taken out of service in 1920. Bellona was quickly sold for scrap in 1921, but Boadicea was not sold until 1926.
