The enigma of a code-breaker's death
The facts are these. Gareth Williams was 31, studied mathematics at Cambridge, was recruited by the government's listening and monitoring operation in Gloucestershire, and was lent for a year to MI6. He moved to London last September, lived in a five-storey security services safe house at 36 Alderney Street, Pimlico, worked on matters such as computer security involving the City, and led, as far as police can tell, a rather introverted existence
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