Unibet - This is the premier book maker in the United Kingdom. They offer betting options on all major sports including horse racing, tennis, and all major sporting events. The software is simple and easy to use. They make it easy to place a wager in real-time.
They have been recognized for the superior customer service that is offered and have a stellar reputation in the United Kingdom.
Ladbrokes - Considered to be the leading book maker in the industry with over 2700 wagering outlets in the UK, Ireland, Belgium and Spain. They are clearly doing something well as they have over 800 000 active clients who enjoy the services that are offered here.
They do everything well from sports, to bingo, casino games, poker and much more. If you want to place a bet on your mobile phone they have you covered with an amazing app that has an intuitive interface.