Found this deal instore at two of my local Sainsbury's (Nottingham) so might be nationwide.
Generally retails around £4.
This is the Class 4 which is less sort after compared to the ULTRA Class 10's so take note.
Still a pretty good deal if you just want to use it for mp3's and photo's, maybe not great for video though.
Memory Card Type: SD/SDHC
Memory Capacity: 8G
Class Rating: Class 4
Read Speed: 10MB/s
Write Speed: 6MB/s