Why German carriers demand a British carrier response

How would the Royal Navy respond if Germany built Scharnhorst derivatives and carriers before 1941?

The battleships are manageable, but the carriers require Britain to get its own carrier force into service.

Scharnhorst derivatives armed with 11-inch guns are judged manageable for the King George V-class battleships. A much heavier German armament would change that calculation, but another batch of ships like the historical Scharnhorsts would not define the British response. The proposed German carriers are the more consequential threat because the Royal Navy would need carriers of its own to counter them. The force-matching logic is direct: battleships answer battleships and carriers answer carriers.