UK's biggest Second World War air raid shelter reveals life on Home Front. Tunnels dug into cliffs along River Mersey in Stockport held up to 6,500 people and were state of the art in 1930s Britain, with electric lighting and flush toilets.

Tunnels dug into sandstone cliffs, running alongside the River Mersey in Stockport, could hold up to 6,500 people and were state of the art - with electric lighting and flush toilets.

The caverns attracted terrified victims of the Blitz from across Cheshire and Lancashire at the height of the Second World War. The shelters were so popular the council had to introduce season tickets in a bid to dampen demand, although historians said no one was ever turned away.

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