In for a penny, and in for a pound - with the boss of Poundland, Jim McCarthy. He's opening dozens of new stores - as others are shutting up shop. Hear the not-so-secret secret of his success and guess what the biggest seller at Poundland is. Simon Duffy co-founded Bulldog Natural Skincare after finding a gap in the market while on holiday. Right from the start he wanted his products accessible to all by being on the shelves of a large retailer, he succeeded and now has 5% of the market. Sarah Bridge joined the Financial Mail on Sunday in 2000 to write about small businesses and dotcoms before moving to cover the leisure sector.