Interwar treaties allowed Britain to build unlimited qualifying sloops outside the main tonnage categories, subject to limits on displacement, heavy guns, torpedoes, and speed. A continuous programme through the 1930s therefore preserved both ships and design experience. Once Treasury restrictions eased, the Navy could turn exercise results into requirements for escorts combining anti-submarine and anti-aircraft protection. The Hunt-class concept was meant to accompany fleets built around ships such as Nelson and Rodney as well as convoys bound for the Far East. Flower-class corvettes added numbers for convoy and patrol work, making the programme broader than a single emergency role.
Notable Point · 50:07-52:53
How treaty sloops preserved escort design capacity
Treaty exemptions let Britain continue building sloops, preserving experience that fed directly into the anti-submarine and anti-aircraft escort requirements of 1938.