HMS Britannia was a King Edward VII class battleship laid down 4th February 1904, launched 10th Decmeber 1904 and commissioned 1906. She was torpedoed and sunk off Cape Trafalgar 9th November 1918 by German U-Boat UB-50. She was the last Royal Naval vessel to be sunk during World War 1, two days before the Armistice was signed. She first saw service with the Atlantic fleet in December 1906, moving to the Channel Fleet in February 1907, joining the 2nd Division of the home Fleet as Flagship of Vice admiral in April 1909. while serving with the 2nd division she joined the Mediterranean fleet for a short period of time before returning. At the start of World War 1, Britannia joined the 3rd battle Squadron of the Grand Fleet. In January 1915 Britannia ran aground at Inchkeith suffering major damage.

Four 4 inch guns in pairs, four 9.2 inch guns in singles, ten 6 inch guns in pairs, fourteen 12 pounder guns, fourteen 3 pounder guns, two maxims and five torpedo tubes. Displacement 16,350 tons, speed 18 knots, complement 777.