Instructions:Just got this through in an email today.
Enter the code at the checkout.
Terms & Conditions
^1. This offer is for £5 off when you spend £50 or more online at Marks & Spencer.
2. Offer cannot be used in conjunction with any other promotion that requires a code, other than free delivery.
3. Offer cannot be used with the purchase of Technology, Household Electricals, Large Appliances, Gift Cards, Gift Vouchers and financial services products.
4. Your discount will be shown when you add your qualifying value to your shopping basket and enter promotion code MSWBNC54 when prompted.
5. This offer can only be redeemed once, is subject to availability and is strictly non-transferable.
6. This offer is valid until 29 January 2008 inclusive.
7. Eligible products must have the same delivery date for promotion to apply across all items.