Bet online on sports & racing with William Hill. Whether you fancy fixed odds or Double Down betting - we got you covered | William Hill Australia. Bet online with William Hill, the top UK bookmaker. We currently have markets available on 43 events across 6 sports - View all our Live In-Play Events. Bet on William Hill Mobile for all the top games and best odds. Easy Log In from your smartphone or tablet. Enjoy great mobile sports betting today!.