Ordering right now cant miss that!
Go for the 2GB its nly £127 just foundhttp://www.waeplus.co.uk/item/206261/Radeon-HD-7850---2-GB-GDDR5---PCI-Expres
Since The difference is £5 so worth going for 2GB
I didnt notice the 2GB before but just now.
If you have placed the offer dont worry you can still edit till dispatch by company.
Glad to help mate, enjoy.