RGB Tech are selling the 500D without any codes at £609 inc del.
They are also an authorized dealer so you can take advantage of the latest cashback, which requires you send in an old camera (slr) as trade in for £60.
If you have this then you'll have a final price of £549.00
I have seen it cheaper at some online retailers, but these guys are sound, and very quick next day delivery.
You can also buy at their Middlesborough store for the same price.