Warship design lessons from the Falklands War

What design changes did the Royal Navy make after the Falklands War?

It strengthened close defence, damage-response systems and subdivision, and stopped using aluminium in British warship hull structures.

The lessons went beyond a general preference for larger ships. British designers placed greater emphasis on close-in defence and on systems for responding after a hit. Internal subdivision received renewed attention so flooding and fire would be easier to contain. Aluminium also disappeared from British warship hull practice, reflecting concern about material behaviour under combat damage.