I found this last night in my local ASDA but it is nationwide and online.
6 Muller Light Assorted Chocolate flavoured yoghurts in the wrapper for £1.38. This may not seem like a good deal for yoghurt, but it's 4 for £2 if you buy them singular. At £1.38 it works out at 23p a yoghurt, when originally it is 52p a yoghurt.
The flavours are; Chocolate & Vanilla, Chocolate & Orange and Chocolate & Cherry. I personally have these every day for my breakfast and they are nice and worth this price.