There will be another £5 Tesco Voucher printed in this weeks News of the World 17/08/08. Simply hand the voucher in at the till when you go to pay for your Groceries. Minimum spend £30, valid in-store only for 7 days. (Works out at 20% off.) No details on the web yet that i can see, but just read about the offer in todays sun.
£5 off a £30 Shop instore @ Tesco's - Voucher in News of the World 17/08/08 = 20% OFF