G3 battlecruiser
 The G3 battlecruisers were a class of battlecruisers planned by the Royal Navy after the end of World War I in response to naval expansion programs by the United States and Japan. The four ships of this class would have been larger faster and more heavily armed than any existing battleship (although several projected foreign ships would be larger). The G3s have been considered to be proper fast battleships since they were well-balanced designs with adequate protection.