Most of my betting is now done using the betting exchange betfair.com. On betfair.com you get more choice than a traditional bookmaker as you are a betting against other punters and on average 20% better odds. You can back and lay on any sports markets from Football to Horse Racing, Golf and Tennis - look out for live in play markets too.
Get a FREE £20 bet on joining and also a reward at the end of 3 months based on the amount you have bet. To qualify simply register online at www.betfair.com and enter this code 3RTMRNEND when you are filing out your details under "Please enter your 'Refer and Earn' or Promotion code here".
http://www.betfair.com