Tambo......I will excuse your post at 10:42, as it was obviously due to ignorance of the full story of the Abervan disaster.
Perhaps you could have a look at the following link, when you have a moment :::
https://en.wikipedia.org/wiki/Aberfan_disaster
Mush has it 100% right. Here is a quote from the first page of the Wiki link ::
"The official inquiry blamed the National Coal Board (NCB) for extreme negligence, and its chairman, Lord Robens, for making misleading statements"
Here is a another quote ::
"Anger at the NCB erupted during the inquest into the deaths of 30 of the children. The Merthyr Express reported that there were shouts of "murderers" as children's names were read out. When one child's name was read out and the cause of death was given as asphyxia and multiple injuries, the father said "No, sir, buried alive by the National Coal Board".
The coroner replied: "I know your grief is much that you may not be realising what you are saying" but the father repeated:
I want it recorded – "Buried alive by the National Coal Board." That is what I want to see on the record. That is the feeling of those present. Those are the words we want to go on the certificate"