Went to Asda today to get something for breakfast. Saw that they had a special price on their granola yoghurt corner (NOT Smartprice but branded version) 37p or 3 for £1.
Took two through to the checkout and both went through at 15p.
I got this from the Leyton, London branch and not sure whether it is nationwide.
Did not taste that bad either - stocked up for next weeks breakfast!
(Sorry, no picture available - they do not seem to have it on their website)