6= PATRICK MCKENNA
An accountant and former partner at the ripe old age of 28 with Deloitte & Touche, where he headed its media and entertainment group, Brentwood-based Patrick McKenna later ran Lloyd Webber’s Really Useful Group until he started his Soho-based Ingenious Media operation in 1998. It invested in Hollywood blockbuster movie Avatar making about £123m. But in 2013-14 Ingenious profits fell to £5.9m on £103m turnover. We clip McKenna back to £400m allowing for other assets.