You can add 3 to a basket at any given time, 3 games for £76.11 aint bad. Even on pre-orders on later games like MGS3DS it works out at £25.37 which has to work out cheaper in the long run.
To recieve your 15% off discount code just goto http://www.rewardyourthirst.com
Register and recommend the same person/email 3 times, 1 point is rewarded each time when you total 3 points you can redeemed for a 15% off code.
You can even register with a fake email address AND even the email address to recommend can be spammed as the same one again and again.