Instructions:Perfectly timed for the release of Mac OS X Lion!
As the new Mac operating system will be distributed through the Mac App Store, this deal is perfect. It effectively saves you £5 off the price of the download.
To redeem, either press Go To Deal and follow the instructions, or simply ask the checkout staff at the Co-Op as they all have a barcode that can be scanned.
Tried searching for this deal, couldn't find it, so apologies if someone has already posted it.