Thirty years on, I have seen a fire report submitted by the Timber Research and Development Association, the one independent body to carry out an inspection of Valley Parade’s main stand before the tragedy, that concluded it was “extremely unlikely that a small source of ignition on its own, say a cigarette in a plastic cup, could have been the primary cause”. The association felt so strongly about it this entire passage was underlined in black.
(Link also starts with piece about Blackpool)
http://www.theguardian.com/football/blog/2015/may/02/karl-oyston-blackpool-tangerine-nightmare-stan-mortenson