Would Royal Navy amphibious forces be used only in Norway or for something more ambitious?
Short answerMost likely Norway, because controlling that flank is central to the Soviet and NATO routes into the Norwegian Sea.
NotesMore ambitious employment is possible, although the northern flank is the practical priority. Soviet access from the Kola Peninsula into the Norwegian Sea places Norway directly across the route of the naval campaign. Royal Marines and their shipping would therefore reinforce the flank before being considered for a more speculative operation. Holding Norway helps preserve the geography that shields NATO's forward carrier and submarine operations and constrains Soviet movement into the Atlantic.