This was a plan to leave behind spies should the British lose control of the Rock of Gibraltar in World War II.

[1] The eight meter high cave was named after a lamp that was discovered in 1937 which was mistakenly thought to be of Coptic origin.

The lamp is now thought to be Roman and to have been brought to Gibraltar by Vandals or Byzantines.

These caves were intended to deflect any investigation by invaders of Gibraltar who were looking for spies left behind by the British.

A shaft was created at the back of the cave which was intended as an escape route and for the delivery of materials via a wooden ladder.