It is located near the southern end of the Upper Rock Nature Reserve, just north of O'Hara's Battery.

Lord Airey's Battery is in Gibraltar, the British Overseas Territory at the southern end of the Iberian Peninsula.

[9][10][11] Earlier, during the Crimean War, he had served in the capacity of quartermaster-general to FitzRoy Somerset, 1st Baron Raglan.

While Airey was regarded very favourably by his superiors, including Lord Raglan, public perception was that he was one of those responsible for the inadequate provisions during that war, as well as the disastrous Charge of the Light Brigade.

The men were expected to observe and report the activities of the German forces for about a year, sending radio messages.

A section of the floor near the entrance had been prepared with layers of loose bricks to facilitate burial should any of the men die during their confinement.

The long-sought-after site was discovered in December 1997 by the Gibraltar Caving Group close to Lord Airey's Battery.

In 1998, one of the men involved in the construction of Stay Behind Cave, Dennis Woods, came forward and confirmed its authenticity.

The battery is under the supervision of the Gibraltar Tourist Board, but managed on a day-to-day basis by a private company.