Aberfan remembered: Disaster in the Welsh valleys - BBC News
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Aberfan survivor: My childhood ended that day
21st October 1966: 144 people killed in the Aberfan disaster
Queen And Duke Visit Aberfan Disaster Area (1966)
The Aberfan disaster was the catastrophic collapse of a colliery spoil tip at around 9:15 am on 21 October 1966. The tip had been created on a mountain slope above the Welsh village of Aberfan, near Merthyr Tydfil, and overlaid a natural spring. A period of heavy rain led to a build-up of water within the tip which caused it to suddenly slide downhill as a slurry, killing 116 children and 28 adults as it engulfed the local junior school and other buildings. The tip was the responsibility of the National Coal Board (NCB), and the subsequent inquiry placed the blame for the disaster on the organisation and nine named employees.