The phenomenal growth and success of person to person betting over the last few years, principally in the form of Betfair, has led to hundreds of people discovering the potential profits of backing and laying in sports events. It is a far cry from the slightly shadowy world of the bookmakers’ shops from years gone by, with the modern professional gambler more likely to be at home or in an office using trading applications and fast live streaming data in the same way that traders on the financial markets would.