IN NUMBERS: Alan Sugar

Chairman of The Apprentice (9pm, BBC1) since 2005, Lord Sugar is currently ranked the 103rd richest person in Britain. Here are some of his other significant numbers…

£100 The sum he invested in his first business, after leaving school at 16. He spent more than £50 on a second-hand minivan and insurance, and the rest on car aerials to sell. At the end of his first week of trading, he’d made £60 profit.

1968 The year he launched his retail electronics company, Amstrad (Alan Michael Sugar Trading). He was 21. By the mid-1980s, Amstrad was thriving in the competitive home computing market. In 2007, he sold Amstrad to broadcaster BSkyB, for a reported £125 million. 10 The number of years he was chairman of Tottenham

Hotspur, from 1991-2001. It was not a happy time, but he remains a Spurs supporter to this day, much like his right-hand man on The Apprentice, Claude Littner. Right-hand woman Karren Brady is the vice-chair of West Ham. £0 The amount he pockets for his role on The Apprentice. From the start, he did not want to be paid to do the show, but when the BBC insisted he had to be paid, he donated his fee to Great Ormond Street Hospital, one of a number of charities he supports. 1 The number of episodes of Doctor Who he has appeared in. The Power Of Three aired in 2012, and featured the 11th Doctor (Matt Smith). Sugar’s scene was shot on the set of The Apprentice.