Fordham's Accommodation are underground parallel chambers within the Rock of Gibraltar built during the Second World War.

The chambers were named after Colonel H M Fordham OBE, MC, who was Chief Engineer in Gibraltar.

[1] The tunnel is named after Colonel H M Fordham OBE, MC, who was the Chief Engineer in Gibraltar from 1940 to 1941.

The purpose of the World War II tunnelling project in Gibraltar was to provide sufficient accommodation to enable a garrison of 16,000 to live underground and resist a siege for a period of up to a year.

Frosted glass windows helped the occupants feel a sense of normality despite being deep underground.

spans up to 35 feet (11 m) had been cut with flat roofs, but these gave endless trouble from rock falls, particularly when further excavations were being carried out in the vicinity.