Gateway laptop for under £500 from Tesco.
I think the MT6825b is a new range that Gateway have brought out (I remember seeing a very high spec for a low price recently but that was sold out in no time).
Core 2 Duo (T5200) processor
15.4" ultrbright screen
100GB hard drive
4 USB ports
up to 3 hours battery life
Vista home premium
Cant see many negatives - not bad for sub £500