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Great Britain is a major island just off the coast of northwestern Europe. In the real world, it forms part of the core of the United Kingdom, with three of the current member countries—England, Wales and Scotland—located in Great Britain. The island is the largest of the British Isles, and is directly east of the next largest island, Ireland.
Great Britain is also the setting for virtually all the scenarios in Mutants in Avalon, a supplement of the After the Bomb series of tabletop RPGs by Palladium Books.