You're probably going to look over your shoulder to make sure Jeremy Beadle isn't standing behind you with a microphone when I say this, but using betting exchanges probably costs most punters' money.

Make no mistake - the arrival of Betfair, Betdaq and Sporting Options has given bettors a higher chance of staying ahead of the game than ever before. However, they're not always the punting promised-land they claim to be. In fact, according to some of the leading figures in the betting industry, the comfort zone of exchange betting with one company is the reason many of us fail to make a profit each season.