How Britain would hunt two German capital ships

How would the war change if Gneisenau had received 15-inch guns before sailing with Bismarck?

Britain would respond with larger hunting groups and bring Home Fleet and Force H strength together rather than operate in pairs.

A sortie by Bismarck and a rearmed Gneisenau would make two-ship British groups inadequate. Hood, Prince of Wales, King George V, and Victorious could form one hunting force. Another group could draw on Rodney, Renown, Furious, Ark Royal, or other available Home Fleet and Force H ships. Britain had the numerical depth to organize groups of three or four major units and avoid accepting an even fight. The counterfactual shows how the size of the raider threat changes task-group organization across the fleet.