The former CFO who took over the hot seat from James Murdoch last December, Darroch has reintroduced door-to-door sales teams in a bid to keep his customer base growing. It seems to be working so far - subscriber numbers hit 9 million in the three months to October, up 5% on last year. That's nearly three times as many as arch-rival Virgin. Rates of churn remain impressively low, too. But he's under the Ofcom spotlight, owns a big chunk of dead-duck ITV and may be forced to sell some of Sky's valuable broadcast rights to competitors at bargain prices.