There were 2 British designs during WW2 for Cruiser that where not built .( Conway's . All the worlds fighting ships 1922-1946 . page 36 )
Both around the 16,000 ton range . both around 650ft in length and 32 knots , main difference was armament .
9 x 8 inch/50 mark IX or X guns , the other 12 x 6 inch 50 QF Mk4 HA .
They would fill T9 and T10 slots