Went to Birmingham store and saw this with £1 off...
I understand you need to get £29 membership but this is a good deal still! cheap! and if you buy membership you get another for free! lol
£1.44 for 1 in Tesco - http://www.tesco.com/groceries/Product/Details/?id=263041836
normal price in costco is £4.95
hope this helps!