Select the corresponding item for your voucher and click "Add to Basket". You can also shop for other items that you want.
When you're done shopping, click "Basket" found at the top right corner of the page.
Review your item(s) and click "Checkout Securely".
Enter your email address and click "Continue". If you wish, you can register or sign-in to your account later.
Enter your delivery detail ans click "Save & Continue".
Just below your "Order Summary", you will see "Do you have a voucher code?" and below it the box labelled as "Enter voucher code here". Simply type in or paste your voucher code and click "Apply". Your orded total will then be adjusted accordingly.