There was a programme about it on BBC1 last night, well worth checking out on Iplayer.
I knew the circumstances of the tragedy fairly well, having studied it in some detail at Uni, but pictures of graves, mourning parents and the callous indifference of the NCB make it rather more real than dusty discussions of geomorphology and hydrology. It was also somewhat heartening to learn about the dogged determination of Lord Ackner, and finally, the return in 1997 of compensation taken by the Labour government to pay for the removal of spoil.