Gleision: The mining disaster that was quietly forgotten

The flashback hits Jake Wyatt as he watches Peppa Pig with his granddaughter and a waterfall appears on screen.

Suddenly he's underground in the dark, there's a noise "like a jet engine" and a torrent of water rushes towards him.

"There's nothing you can do to stop it. You don't get a warning. It's instant, it's there," he says.

Jake, 68, is one of three survivors of the Gleision Mine Disaster, which claimed the lives of four of his friends 10 years ago.

Charles Breslin, 62, David Powell, 50, Phillip Hill, 44, and Garry Jenkins, 39, drowned after water rushed into the colliery, near Cilybebyll, Neath Port Talbot, following a controlled explosion on 15 September 2011.

A desperate two-day rescue effort to save the four trapped men attracted rolling news coverage around the world.

But ultimately, it proved fruitless.