From battlecruisers toward fast battleships

The Lion-Queen Mary-Tiger sequence shows the battlecruiser side of the Royal Navy's movement toward fast battleships. Tiger became denser, more subdivided, and better protected, while the Queen Elizabeth class approached the same problem by trying to make a battleship faster. Both paths sought a capital ship with enough speed for strategic repositioning and tactical adaptation without surrendering decisive fighting power. More small boilers, followed by later machinery replacements, might have given the Queen Elizabeths a clearer claim to be the first fast battleships. Queen Mary sits on the cusp of a new type even though her own design remained an incremental Lion refinement.