Sir Brian Souter and Ann Gloag
Rank 2017
Souter, 63, is backing a private equity takeover of a construction recruiter in the UK, while his Souter Investments recently put substantial sums into an upmarket Edinburgh residential property company. He started the Perth-based Stagecoach bus and train operator with his sister, Ann Gloag, 74, in the early 1980s: he chairs it and she remains a shareholder. The family stake has fallen sharply to £312m, though special dividends have garnered the pair more than £320m since 2004. They keep many of their transport interests in a company called HGT Investments, showing £149m net assets in 2015-16. After 2016 dividends of £16m and hefty charity donations we clip them back by £80m.

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A Life in the Day: Sir Brian Souter