Video and timeline: How the Abferfan disaster happened

By The Newsroom
Published 21st Oct 2016, 10:03 BST
Updated 25th Oct 2016, 20:38 BST
The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.
The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.
The disaster that killed 116 children and 28 adults when 150,000 tonnes of coal waste slid down a hillside before smashing into Pantglas Junior School, was entirely preventable.

Indeed, the National Coal Board had been warned years earlier that it was a disaster waiting to happen.

Echoes of a terrible past, as we remember the 144 victims of Aberfan

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Here is the timelime of events that led to one of the most monumental tragedies of modern times...

The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.
The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.

1963

• July 24: DCW Jones, a waterworks engineer, sends a letter to a colleague expressing concern about the danger of the coal slurry being tipped at the rear of Pantglas Junior School.

Speaking of the mountain of coal waste, he writes: “The slurry is so fluid and the gradient so steep that it could not possibly stay in position in the winter time or during periods of heavy rain.”

• August 20: Mr Jones writes to the National Coal Board also expressing concern about the tip. He writes: “You are no doubt well aware that the tips at Merthyr Vale tower above the Pantglas area and if they were to move a very serious position would accrue.”

The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.
The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.

1964

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• Local councillor Gwyneth Williams expresses also concern in a letter about the giant coal waste - fearing that “it could threaten the whole school”.

1965

• January: Two mothers present a petition to the school’s headmistress Ann Jennings about flooding concerns caused by tip number seven. It is later discovered that the mountain of coal waste had been dumped on top of several underground springs. Mrs Jennings later takes the petition to the local council - but the warning is not heeded.

The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.
The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.

1966

October 21:

• 7.30am: Mine workers arrive at work on a foggy morning to find tip number seven had sunk around 3 metres (10 feet) overnight.

• 9am: With no phone lines on the hillside, a coal worker walks down the mountain to tell bosses about the sinking problem. By the time the order to stop adding to the tip is given it has sunk 6 metres (19.5 feet). By now the school bell has rung at Pantglas and 240 pupils go inside in an excited mood on what was their last day before half term.

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The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.
The scene at Aberfan, Glamorgan, after a man-made mountain of pit waste slid down onto Pantglas School and a row of housing killing 116 children and 28 adults.

• 9.15am: The tip gives way and 150,000 tonnes of liquefied slurry slides down the mountain and towards the village of Aberfan. The slurry hits the school and houses on Moy Road with an almighty force.

• 9.25am: First call to the emergency services received. Mines Rescue Service Roy Hamer, who was on duty that day, later says he remembers telling a colleague at the time: “This is going to be something terrible ... why do they want us at a school?”

• 9.50am. Fire crews are now on the scene and describe it as “utter pandemonium”. Firefighters, emergency services and miners begin an around the clock battle to dig out those trapped by the debris.

• Between 11am and midday: The last survivor, Jeff Edwards, is pulled out from the rubble. He had been pinned for more than two hours with the head of a dead girl against him. As news of the disaster emerges, miners and residents from neighbouring communities rush to Aberfan to help with the rescue effort, forming a conveyor belt of “bucket brigades” to help move the waste away quicker.

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