By Nat Rothschild Urgent reforms are needed to prevent the flow of companies exiting the London Stock Exchange becoming a flood – and AIM is a great place to start, says Lord Rothschild As the executive chairman of a company listed on the Alternative Investment Market (AIM), conventional wisdom dictates that I must be desperately unhappy with my lot, frustrated by the lack of liquidity in my shares while contemplating exiting the market altogether and relisting our shares in America. But I’m not. While every day seems to bring with it news of another company departing London for New York, the …