What would a British counterpart to Alaska look like?

If the Royal Navy built a British counterpart to the Alaska class, what would it look like and why would it choose its gun calibre?

About 18,000 tons with nine fast-firing heavy cruiser guns, preserving cruiser rate of fire rather than moving to slower battleship-scale weapons.

The proposed British large cruiser is roughly 18,000 tons with nine heavy cruiser guns. The preferred calibre reflects a Royal Navy desire for the largest gun that could still sustain a cruiser-like rate of fire. Moving to ten- or twelve-inch weapons would push handling and output toward battleship practice. The result would emphasize putting more shells into the air rather than matching Alaska's design directly.