Copy the promo code you want to use, then go to the Beer Hawk UK website and add the items you would like to buy to your shopping cart. If you are done shopping, click on the 'View Cart' or 'Checkout' option, it will lead you to the checkout page. On the checkout page, you will find a box that says 'Discount Code' or 'Promo Code'. Paste your promo code on this box and apply. You will see the updated price. Now proceed with your payment information.