To use a voucher code, add your chosen products to the basket and click on the View Basket button in the top right corner of the screen.
Here you'll see a box called "Discount Codes"
Enter your voucher code in the box then click on "Apply Voucher" to add the discount to your order.
Confirmation of the voucher code will be shown at the top of the screen and the voucher's effects will be applied - e.g. money off your order, a free item will be added, or delivery charges will be removed.
Once you've finished shopping, click on "Proceed to checkout" and enter your delivery and payment details.
If you want to carry on shopping for stickers, click on "Continue Shopping".
Your offer will remain in your basket until you complete the checkout process.