Your shopping cart will show the items you have chosen.
Choose your shipping option.
Just underneath the image of the final item in your cart, you will see a Promo code box.
Enter your code in the white box (shown in the illustration at the red arrow). Click Apply.
Your discount will be automatically applied to the total. Continue to checkout as normal.
Please note that the promo code box will not be visible on mobiles unless desktop /standard view of website is set.