15-10-1966 Aberfan disaster rescue attempts. 116 children and 28 adults were killed when a slag heap collapsed onto the pit village, South Wales © NLA

16-10-1971 Road sign to Aberfan, South Wales, where 116 children and 28 adults were killed when a coal tip above the village collapsed and engulfed Pantglas Junior School 1971 © Peter Arkell

16-10-1971 Aberfan disaster, South Wales. White arches in Bryntaf Cemetery, Aberfan mark the graves of the 116 children killed in the disaster, when a coal tip collapsed and engulfed a school in 1966 © Peter Arkell

16-10-1971 Aberfan, South Wales. A village without children, 5 years on from the disaster that killed 116 children and 28 adults in the village when a coal tip collapsed and engulfed a school, 1971 © Peter Arkell

15-10-1966 Aberfan disaster rescue attempts. 116 children and 28 adults were killed when a slag heap collapsed onto the pit village, South Wales © NLA

15-10-1966 Aberfan disaster rescue attempts. 116 children and 28 adults were killed when a slag heap collapsed onto the pit village, South Wales © NLA

15-10-1966 Aberfan disaster rescue attempts. 116 children and 28 adults were killed when a slag heap collapsed onto the pit village, South Wales © NLA

15-10-1966 Aberfan disaster rescue attempts. 116 children and 28 adults were killed when a slag heap collapsed onto the pit village, South Wales © NLA

15-10-1966 Aberfan disaster rescue attempts. 116 children and 28 adults were killed when a slag heap collapsed onto the pit village, South Wales © NLA

15-10-1966 Aberfan disaster rescue attempts. 116 children and 28 adults were killed when a slag heap collapsed onto the pit village, South Wales © NLA

15-10-1966 Aberfan disaster rescue attempts. 116 children and 28 adults were killed when a slag heap collapsed onto the pit village, South Wales © NLA

15-10-1966 Aberfan disaster rescue attempts. 116 children and 28 adults were killed when a slag heap collapsed onto the pit village, South Wales © NLA

15-10-1966 Aberfan disaster, a coffin is lifted into a tempory mortuary. 116 children and 28 adults were killed when a slag heap collapsed onto the pit village, South Wales © NLA

16-03-1972 Alf Robens, NCB, launch of his book Ten Year Stint, London 1972. His reputation was tarnished by his failure to have foreseen and prevented the Aberfan disaster, followed by actions widely regarded as... © NLA

16-03-1972 Alf Robens, NCB, launch of his book Ten Year Stint, London 1972 his successor Derek Ezra at his side. His reputation was tarnished by his failure to have foreseen and prevented the Aberfan disaster, f... © Peter Arkell