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RESULTS FOR 2008
Ranking: 113=
Worth: £720m
Source of wealth: Transport
Buses running on chip fat are a green initiative from Perth-based transport group Stagecoach. Its co-founders, the brother-and-sister team Souter, 53, and Gloag, 65, have a £407m stake and other wealth.
RESULTS FOR 2007:
Ranking: 92
Worth: £770m
Source of wealth: Transport

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