Exercise lessons, AA defense, and Force Z

Why did early-war Royal Navy anti-aircraft defenses appear inadequate, especially around Force Z?

Prewar exercises reinforced false assumptions about which ships aircraft would attack, while Force Z also violated standing doctrine that an independent force in that situation should have carrier support.

British ships entered the war with heavier AA coverage than is often assumed, but exercises encouraged pilots to chase capital ships and led planners to underrate the danger to destroyers. The aircraft losses inflicted around Crete also matter, while Prince of Wales and Repulse were placed in a situation Royal Navy doctrine had warned against since 1933. The episode is a chain of learning, deployment, and command failures rather than proof that every element of British AA doctrine was worthless.