From www.Sportsshoes.com website
I entered a discount code at the checkout/I'm entitled to free delivery, why is my order confirmation not showing the discount?
We apply the discount when we're despatching your parcel and after we've validated the discount code. So, it won't show on your order confirmation, but you'll only be charged the amount minus the discount.
Just to be sure you could email them prior to order, so as to make sure they will honour it. Good luck, worked for me
Edited: 14/05/2012 at 18:07