Why was Renown ordered not to intercept Bismarck?
Short answerShe was held as a reserve in case Rodney and King George V failed, and was not needed once those battleships could finish the pursuit.
NotesRenown was ordered not to intercept Bismarck, just as nearby destroyers were cautioned against closing the battleship on their own. She could serve as a reserve in case Rodney and King George V failed or Bismarck proved more formidable than British intelligence expected. Once those two battleships were in position for the final action, another battlecruiser added less than the loss of a scarce fast capital ship might cost elsewhere. The decision managed uncertainty and preserved options; it did not mean Renown's 15-inch guns could never threaten Bismarck.