This is my first post but anyway....
I don't think I've seen it mentioned on here that in every Sun newspaper last week was a £5 off £30 spend at Morrisons. They are only valid for certain upcoming weeks.
They have excluded all the obvious things such as cigarettes and petrol but you can use them on games.
Morro's is a bit hit and miss on game prices but Rock Band and GTA 4 are both £39.99 meaning if you have a voucher you can get them for £34.99.
I realise that this is only good if you have the voucher, but some people probably didn't even know they had them already.