How do I check if a promotion has been applied to my order?
When you reach the payment page of the checkout, you’ll have the option to enter a promotion or loyalty code. Enter your promotion code in the box and click ‘Apply’. Your shopping basket should update to show the promotional discount (if applicable). If your promotion code isn't working, please check the terms and conditions of the promotion to make sure your order meets the offer criteria.
For further information see terms and conditions on marksandspencer.com. © 2017 Marks and Spencer plc