HMS Boadicea was the lead ship of the Boadicea-class scout cruisers built for the Royal Navy in the first decade of the 20th century. She led the 1st Destroyer Flotilla from completion until 1912. During World War I, she was assigned to battleship squadrons of the Grand Fleet. She was present at, but did not fight in, the Battle of Jutland in mid-1916. The ship was converted into a minelayer at the end of 1917 and made three sorties to lay her mines before the end of the war.