David Milles and family have a net worth of £34 million as of April 2012, according to the Sunday Times UK Rich List. Hexadex is a Lincolnshire-based manufacturer of stainless steel exhausts and industrial couplings. In 2010 it turned from a £4.5m profit to a £138,000 loss after writing down £5.4m on the sale of a business — but turnover rose by 28.3% to £79.3m. Founded in 1993, Hexadex is run by Milles, who with his family and trusts owns 90% of the shares. With a strong balance sheet and £36.3m net assets, Hexadex is worth that sum. Past salaries take the family to £34m.