Just a note to correct you (four years too late) in case anybody else is directed here by Google searches....the Glomfjord powerplant was Operation Musketoon - in Autumn of 1942. Operation Seagull was where the Uredd was actually lost (Feb 1943 for her sinking).

I'm not sure if the operations were related, other than the fact they shared a single commando (Sverre Granlund)