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Nicholas Berry and family

Berry, 64, has spent about £10m buying into Cuba’s national debt. With Fidel Castro ailing, he hopes to cash in once it becomes a 21st-century economy. His family netted £31m in the 1985 battle with Conrad Black for the Telegraph newspaper group. Berry controls the Stancroft Trust, an investment vehicle with £59.1m net assets in 2005-06. We value his stake at £30m. In all, the family is easily worth £100m.