5 Pounds - Elizabeth II 84th Birthday

Tristan da Cunha, a British Overseas Territory in the South Atlantic with a permanent population of fewer than 300 people, has no meaningful circulation coinage economy of its own. Issues like this one are produced entirely for the collector market, authorized through the island's nominal issuing authority but struck and distributed by outside minting operations. The 84th birthday denomination is itself arbitrary — chosen to fill a gap in an ongoing birthday series rather than mark any administratively significant year.