The market leader with the highest turnover of bets. They charge commission between 2% and 5% of your net winnings, but that's more than offset by the better odds you receive. The more you bet the less commission you pay.

You bet against other people so you don't have to pay the bookie.

This means you win on average 20% more.

Register an account www.betfair.com and new customers will receive a free £25 Bet.