Who commands at Savo when Warspite brings Somerville?

If Warspite arrives with her own crew before Savo Island, does she also bring an admiral who takes command?

The panel identifies Somerville aboard his Operation Stab flagship and expects his seniority to put him in command of the Allied force.

The follow-up asks whether the crew swap also brings Warspite's flag officer. The panel identifies her as Somerville's flagship during Operation Stab in August 1942, the diversion intended to distract Japan from Guadalcanal. On that premise, his seniority changes the Allied command arrangement at Savo. Other commanders would come to Warspite for their meeting instead of a flagship leaving its position to attend elsewhere. Clearer command and the battleship's command facilities become advantages before its radar and 15-inch guns enter the fight.