Football Manager 2007 is £14.45 at blahdvd.com and with the £2 off for new customer voucher you get it for £12.45. I had an account with them already but made a new account under a new email address and everything is fine.
Use the link above to sign up to the new account and get the voucher and then go to the site and buy the game with the voucher.
Thanks to Emmajk42 for the voucher :) Good Luck
EDIT: You can also get 5% through Quidco, not alot but every penny counts :) - uk-mobileshop