What if HMS Glorious had two County-class cruisers when Scharnhorst and Gneisenau found her?
Short answerThe extra command and scouting capacity would probably detect the Germans early enough for Glorious to evade, strike, or summon support.
NotesTwo County-class cruisers would give Glorious useful 8-inch-gun escorts and make a German surface attack less attractive. Their greater importance is the command structure they bring, because an admiral would almost certainly insist on reconnaissance aircraft over contested waters. Earlier detection would let Glorious launch a strike or turn away before Scharnhorst and Gneisenau reached gun range. It would also create time to call heavy units such as Warspite toward the contact.