Would Britain still need a York-class equivalent?

Would Britain build a York-class equivalent with three triple 9.2-inch turrets?

Probably not: the Royal Navy could keep the older Tiger Cub lineage in service and replace it directly when needed, reducing the need for a cheaper equivalent.

The proposed treaty treatment gives the Royal Navy a durable baseline force of older ships that can remain in service until replacement is convenient. Grandfathering and replacement rights remove the immediate pressure to build a cheaper intermediate design merely to maintain numbers. The existing Tiger Cub lineage already fills the station-cruiser role and can be renewed directly when Britain is ready. A York-class equivalent with three triple 9.2-inch turrets therefore adds little unless some separate cost or mission requirement emerges.