In this months (march 2008) asda magazine (freely available in store) there is a 40p voucher for use on Total Greek Yoghut products on the last but one page. The cheapest ones are the 150g natural no fat and the greek yoghurt with honey. These are about 47p - with your voucher - 7p!!
Also available on line using the following code t7-tg-yh-44 - add it to your basket and see.
One coupon per purchase
valid till end of april