Steel doors thick enough to withstand a nuclear blast are unlikely to open for the forseeable future.

Eastern Daily Press: Graham Wray inside the civil defence bunker in King's Lynn. Picture: Ian BurtGraham Wray inside the civil defence bunker in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)

For officials say there are no immediate plans to allow the public to view King's Lynn's secret bunker from which much of Norfolk would have been governed in the event of a nuclear war.

Once a top secret, the underground shelter is tucked away beneath an old people's day centre, on one of the main roads out of town.

Eastern Daily Press: Telephone numbers and other informnation on the walls of the civil defence bunker in King's Lynn. Picture: Ian BurtTelephone numbers and other informnation on the walls of the civil defence bunker in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)

A Norfolk County Council spokesman said: 'There are currently no plans to open the site to the public. It is wind and water tight and is not deteriorating any further.

'It wouldn't be fair on those people attending the Crossroads Day Centre if we opened the site up and disturbed them with lots of visitors coming and going.'

Eastern Daily Press: Inside the civil defence bunker in King's Lynn. Picture: Ian BurtInside the civil defence bunker in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)

The EDP was given a tour of the facility off the Wootton Road in 2012.

The subterranean complex is hidden down flights of stairs from an anonymous porch.

Eastern Daily Press: Inside the civil defence bunker in King's Lynn. Picture: Ian BurtInside the civil defence bunker in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)

It once housed a command and control centre, from which damage reports and casualty numbers would have been collated in the immediate aftermath of an attack.

Charts on the walls have spaces to record radiation levels and casualties across West Norfolk if the balloon had ever gone up.

Eastern Daily Press: Graham Wray inside the civil defence bunker in King's Lynn. Picture: Ian BurtGraham Wray inside the civil defence bunker in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)

Eastern Daily Press: Graham Wray inside the civil defence bunker in King's Lynn. Picture: Ian BurtGraham Wray inside the civil defence bunker in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)

Eastern Daily Press: Bunk beds inside the civil defence bunker in King's Lynn. Picture: Ian BurtBunk beds inside the civil defence bunker in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)

Eastern Daily Press: Inside the civil defence bunker in King's Lynn. Picture: Ian BurtInside the civil defence bunker in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)

Eastern Daily Press: The civil defence bunker is under the Crossroads Day Centre in King's Lynn. Picture: Ian BurtThe civil defence bunker is under the Crossroads Day Centre in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)

Eastern Daily Press: Inside the civil defence bunker in King's Lynn. Picture: Ian BurtInside the civil defence bunker in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)

Eastern Daily Press: Inside the civil defence bunker in King's Lynn. Picture: Ian BurtInside the civil defence bunker in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)

Eastern Daily Press: The steps that lead down into the civil defence bunker in King's Lynn. Picture: Ian BurtThe steps that lead down into the civil defence bunker in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)

Eastern Daily Press: The main door to the civil defence bunker in King's Lynn. Picture: Ian BurtThe main door to the civil defence bunker in King's Lynn. Picture: Ian Burt (Image: Archant © 2012)