Could Britain build Hawkins-class cruisers with twelve 7.5-inch guns in six twin turrets?
Short answerYes; the guns and turret designs existed, although arranging six mounts would complicate the ship.
NotesBritain had both 7.5-inch guns and twin-turret designs, so the proposed Hawkins armament was technically possible. A twelve-gun version could place two turrets forward, two aft, and one on each wing. A fourteen-gun alternative would use two forward, one aft, and two on each wing. These are possible layouts if the navy chose to pursue the idea.