Ok so using the voucher ZQ289 with no minimum spend you can get Guitar Hero 3 for £2.92 delivered.
Have used the codes before with Littlewoods and they always charge the full amount but will always refund the code a week or two later.
A better deal than the Killzone 2 offer IMO.
You must be an existing customer.
Plenty of gaming bargains on the site using this voucher but this is one of the best. Alternatively guitar hero 3 with guitar is £27.95 on ps3 inc delivery using the voucher.