Heritage Open Days are giving the opportunity to explore a secret Cold War Bunker just outside Preston.

Part of a network of more than 1,000 small underground bunkers built to monitor nuclear fallout of a bomb had been dropped on Preston.

Work is ongoing to restore the bunker in Denham Lane, Brindle, back to how it would have been just before it was decommissioned in the early 1990s.

Read more: Explore more about Preston’s history and heritage

The bunkers would have been manned by three volunteers from the Royal Observer Corps.

Their task was to take measurements of the scale of the nuclear bomb blast and its resultant fallout over a period of two weeks after the attack.

They would phone or radio these results back to a regional HQ on a routine basis.

You must pre-book for the tour of the bunker and you must be aged over 12, physically fit and able to descend a 14ft ladder without assistance.

Read more: Preston Railway Station’s secret underground World War I platform

Most of the tour is due to take place overground and the tour is not suitable for those with mobility issues or claustrophobia.

The tours are running on Saturday 9 September from 10am to 4pm and on Sunday 17 September from 10am to 4pm.

There’s a maximum of three people per tour and each tour takes around an hour.

Booking is via Eventbrite with only the 9 September event able to book for at present.

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