I have read and heard umpteen experts giving their opinion on why Hood erupted. But my father watched Hood for 30 minutes before she went with high powered watch keepers binoculars, at the time he was a Chief Petty Officer E R A first class an he described her with 11 possibly12 major fires out of control, she was on fire from stem to stern. Other on the spot witness's describe the main deck forward of the mainmast lifting. The D N C at the time declared it was her torpedo store of over 30 torpedoes erupting. He was persuaded by the Admirals in London to alter his story as he wanted to remove her torpedo armament completely as he consider them useless and a liability but was refused by the torpedo officiados influence in the Admiralty at the time. Also a urgent signal went round the fleet that oil based paint was not to be used below decks and all the tops of magazines must have a steel top, as some of Hoods upper small weaponry had wooden topped mags, my great uncle told me about the signal as he thought it strange, at the time he was a Captain Overseer based in Glasgow and was in charge of the fitting of all guns to all warships built on the Clyde. After all the common reason among all the guys until recent generations put it down to her going around the world all the time and giving ship visits and so each time she went in a quick coat of shiny gloss was put on in the walkways and some guys who left her before the action described up to 1/4" of paint in places in the walkways ect. But you will not get confirmation on it now as she is now described as a valiant death ride to Vahalla.