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Alastair and Michael Powell
Cables, Property
Rank 2017
291
Worth
£424m
Rise/fall
£11m
Brothers Alastair, 64, and Michael, 59, own Teesside-based Cable Properties, which has more than 130 commercial and residential buildings across the northeast and North Yorkshire. The Powells made their fortune at Cleveland Cable, Britain's biggest cable distributor. Their four separate companies made £21.5m profit and had £301.1m net assets in 2014-15 so are worth at least £410m.