Your gift card is a method of payment so you need to enter your gift card number at the checkout.
Once you've entered your delivery or collection details click on 'Proceed to Checkout'.
Enter your gift card number in the 'gift card number' box. If you're unsure of how much is left on your card, you can also check your gift card balance here too.
If there isn't enough money on your gift card to complete your purchase, you'll be able to pay the remainder with a credit or debit card.
If you need to return for a refund, the Gift Card amount will be refunded back onto the Gift Card you used to pay with so please keep hold of it.