Inform your decision and take a look at which bookies came out on top.įurthermore, at between us we have over fifty years of experience within the horse racing and betting industry. We use the Bookmaker Awards to determine which bookmakers provide the best offers, odds, payment methods and existing customer offers. How do we compile the best promo codes and betting sites? What better month to use your William Hill promo code than in November when the Jumps season is in full swing. Simply copy and paste the William Hill bonus code BB40 into the required field of the registration form when signing up for your free bet, just as you would with a voucher code when buying goods online. The William Hill promo code, also referred to as the William Hill ‘bonus code’ is a short code required to claim the William Hill sign up offer, available to all Irish customers. How to claim your William Hill Promo Code Betting offers can be split into two main types new customer offers, which are available to new customers ONLY and existing customer offers which can be claimed by new AND existing customers.