twothree,
Your: "and how it took NEARLY the WHOLE of the RN to eventually sink it "
And the fatal blow was struck by a Canadian pilot with a Swordfish (he put a torpedo into the rudder post of "Bismarck", this jammed the rudder hard over), they couldn't free it and the ship was helpless, steaming in circles and effectively immobile, until the avenging heavy units caught up with it.
Even so, they fought to the end and went down with all guns firing. You have to salute them for that.
D.