You'll receive your 'refer a friend' discount code by email. If you think you should have received a code but can't find the email, please contact us and we'll be happy to resend it.
On the basket page before checkout, you'll find a box that says 'have a discount code'. Simply enter your code in that box (don't include any spaces) and press 'Apply' before continuing to checkout.
You can only use one code at a time. If you have any difficulty using your code, please contact us and we'll be happy to help.