Anniebach You really don't seem to have understood what Grandad wrote. I wish I could remember more about the talk I attended. The point is that in 1966, there weren't the same H & S regulations, although of course the mining industry did have some. The Coal Board was still a huge organisation and the engineers responsible for the maintenance of the tips just didn't have the systems in place to make people listen.
These days, it's very different. We'll have to wait for the second report to find out whether warnings were ignored and by whom, whether the statutory inspections took place, whether materials used were compliant with standards, whether general fire precautions met minimum requirements, how the council responded to complaints, etc etc.
The point is that most of that "red tape" just didn't exist in 1966.