Cold War bunker 'waiting for Armageddon' found beneath medieval castle in 'perfect location'

The bunker was decommissioned and sealed in 1968, British news agency Jam Press reported.

The tiny space measures roughly 15 feet, 6 inches long and 7 feet, 6 inches wide.

The bunker was intended for volunteers of the Royal Observer Corps (ROC), who would monitor and report on nuclear blasts in the event of war.

"Wherever you lived in Britain, you were probably no more than a few miles from an ROC post," he told Jam Press.

Booth added, "It seems strange to have a Cold War bunker built inside Scarborough Castle, but in many ways, it is a perfect location."

The expert cited the bunker's strategic position on a headland used since the Bronze Age, including during the Roman period and the Middle Ages.

He described it as a "1960s concrete bunker watching for Armageddon."

Booth added that researchers were keen to locate it and "reopen it [to] see what was inside."

"Old mapping gives a sense of where it might be, but it really comes down to survey - looking under the ground with radar to find the big black blob that is a concrete structure," he said.

The bunker remains sealed for now, and researchers found that it had around six feet of water in it.

They hope to open it in the future once it is safe to access.

The find adds to a growing list of recent archaeological discoveries across England.