Went to Larkfield store last night and they had the Birds choclate trifle on for 10p from 98p, grabbed all 6 boxes on shelf as BBE is Feb 2009. At checkout one of the tesco woman was asking the guy scanning my stuff "are they still on for 20p?" and he said ni they are 10p now... dont know if its nationwide, but have a look... its not online so maybe its a discontinued range!? although sticker was yellow. good luck!