betfair.com was one of the first online betting exchanges. On a betting exchange you bet against other people which usually allows you to gain better odds on most sporting events. It also allows you to lay bets, where you become the bookmaker setting the odds for a particular event.

BetHiLo provide both sports betting and casino gambling. They are considered one of the best spread betting sites on the web and usually offer good sign-up incentives.
totalbet.com offers a wide range of fixed odds markets for all major sports. Customers of totalbet.com are also able to place bets directly into the tote pools giving them access to poular bets such as the placepot jackpots and scoop6. They are currently offering a Free £25 Bet! to all new customers.

totesport has built upon its roots within horse racing and now offers customers a wide range of betting opportunities across the world's major sporting events. Have a Free £25 bet on totesport

Other Betting Sites
GameAccount is the fastest growing skill game site with players from over 130 countries competing against one another for big cash prizes. They offer 22 different games such as Tournament Blackjack, Gin Rummy, Backgammon and Hi-Lo Solitaire.