William Hill is a well know English bookie that has gone online. It is the second biggest online sportsbook. They offer a great variety of sports and they offer live betting.
Positive
+Most complete sportsbook
+Best offering of sports
+Great for live betting (In-Play)
+Video for a great variety of sports
+Very fast interface
+Great mobile betting client
+Tax Free payouts within EU
Positive/Negative
+Fast interface
+Cash out functionality
+Great Parlay bonuses
-No search for matches/games