I have just ordered GT5 for £33.24 delivered using a Walkers Rainy Day Savings code;http://www.walkers.co.uk/RainyDay/home/RainyDaySavings.aspx
The codes are unique per person - but to register and earn the points for the voucher is quick and free (took me two minutes);
This has saved me a few pence (well 35p is all) over the same kind of deal with Zavvi (and by the comments - I saved the headache of poor service).
That deal is here;http://www.hotukdeals.com/search?action=search&keywords=Gran+Turismo
Latest conformation date for this game is now 24/11/10.
If you know of a cheaper then let me know - otherwise please explain if voting cold.:)