Bob Gomersall, 68, started this Yorkshire business in 1985. The serial entrepreneur developed a software platform called Surpass, which is used to create, mark and deliver more than 3m computer based tests every year. It works with some of the world’s leading professional bodies, including City & Guilds, Chartered Professional Accountants of Canada and the National Board of Medical Examiners in the US, helping international sales hit £5m last year.