London's Stock Exchange: why aren't companies listing in Britain anymore?

After a year in which a number of big companies decided to list in New York rather than the UK, Evan Davis asks what can be done to attract firms to the London Stock Exchange. With Julia Hoggett, CEO at the London Stock Exchange, Charles Hall, Head of Research at the investment bank Peel Hunt and Conor Lawlor, Managing Director, Global Banking Markets and International Affairs at UK finance.