Why Royal Navy anti-aircraft fits still fell short

Given the expense of capital ships and the importance of air power in exercises, was the Royal Navy's prewar anti-aircraft effort adequate?

It was ahead of many contemporaries but still inadequate because production, misleading exercise incentives, and Air Ministry priorities prevented the fleet from reaching the protection it needed.

The Royal Navy recognized the threat and fitted as many systems as production allowed, but demand rose faster than output. Fully equipping a few ships would leave many others without useful protection, so scarce weapons were spread across the fleet. Exercise rules also created false confidence by underrepresenting dive bombing and attacks on escorts. A wider Air Ministry emphasis on heavy bombers during the rearmament years constrained fighter and naval-aircraft development.