Top Online Bookmaker August 2009 William Hill - Sports - £100 Free Bet William Hill are now offering a free £100 bet for all new online customers. Whatever your sport, it is likely that we will offer odds on it. William Hill are one of the biggest names in betting. They have over 2,000 betting offices in the UK and can be seen on almost every high street. Their online software has recently been improved massively, and they now have a free bet too! Highly recommended.