The Isle of Sheppey was an island off the coast of Kent.

In the 22nd century, human miners worked on mining acid on the island. An electrical surge resulted in a Ganger being able to act on its own accord. It killed its former controller.

In another mining facility, where a solar tsunami resulted in a group of four Gangers becoming self-aware, Buzzer spoke of the event. (TV: The Rebel Flesh)

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