As it says above basically. The HD4870 is a great card and at this price it really is a steal. It is only till midnight on Monday though so get in quick and of course don't forget the quidco. Using the code Pixmas085 will get the price down another £5 as well.
They have the 512mb version for £159 which is also a good deal.
Hopefully this doesn't get voted down like all the other deals for high end graphics cards.