Instructions:Got this through the post hope it helps someone
Terms and conditions
1. Free delivery is valid on first grocery orders over £50 or more placed on Asda.com and checked out before 10pm on 31st August 2010. If the order is amended after this date, the discount will not be applied.
2. Offer only valid to customers who register on the groceries site after 31st May 2010.
3. Only one offer can be claimed per household.
4. Asda Home shopping is available in selected areas only.
5. Asda reserves the right to withdraw the offer at any time.