First, confirm whether you have an account in Whsmith. If not, you can create it first. Then select your favorite Whsmith product and add it to the shopping cart. Click the calculated button, and finally, jump to the Whsmith payment page. After clicking, you can select the Whsmith Voucher Codes you need to use, and then return to the payment page to continue the payment. It should be noted that the used Whsmith Promo Codes will be automatically removed from your Discount Codes.