There could be a few reasons why your promotional code isn't working. If you have entered a code and it does not appear underneath the 'VAT' section and above the 'Shipping' section on the right hand side of the cart page, then it is likely showing an error message above the cart in red. This should tell you why the code is not working. Likely reasons include: - The code may have expired. Many of our promotional codes are limited time offers. - It can only be used on certain products. Make sure that you have the correct item in your basket. - Usage and Min/Max spend restrictions. Check the details of the code offer, there may be a set number of times, or a minimum or maximum order value the code can be used on. Please note that promo code Intro5 gives you 5% off your 2nd and 3rd order whereas promo code Intro10 gives you 10% off your first order only.