The saddest day in the history of the Borough of Merthyr Tydfil was Friday 21^st October 1966, the Aberfan Disaster. In the previous 10 years there had been a good deal of correspondence between Merthyr Council and the National Coal Board concerning the tip. One Council official even wrote, ‘ You are no doubt aware that tips in Merthyr Vale tower above the Pantglas area and if they were to move a very serious situation would occur’. Over a week of heavy rainfall caused a mountain of slag to move incredibly quickly, engulfing Moy Road and Pantglas School just as junior school children were inside. The tragedy caused the sad death of  28 adults  and 116 young children. It is a day that few would ever forget. The tribunal that was held afterwards concluded that ‘ Blame for the disaster rests upon the National Coal Board’.