Just had the email from Tesco. Not a bad deal for 2 games @ £54.90 in total
Offer ends 30/06/11 at 23:59. Pre-Order Call of Duty: Modern Warfare 3 and get Call of Duty 4: Modern Warfare for £10. Offer applies to multiple orders made by the promotion end date. Offer will be applied at the online checkout. Standard T&C's apply.