Why the Royal Navy did not simply want a Forrestal

How did the Royal Navy react to the Forrestal-class carriers?

With some envy, but Britain wanted its own CVA-01 concept rather than a manpower-intensive American carrier copied outright.

The Royal Navy regarded the Forrestal class with some envy because Britain wanted CVA-01 and did not receive it. American ships were optimized for American budgets, personnel levels, and operating practices. Other navies increasingly needed automation to reduce crew demand, which could require extensive redesign of an American hull. A highly capable American ship could still be unsuitable for another navy.