I didn't know about the offer and just asked to trade it in, the man behind the counter valued Black Ops as £33.00 and I only had to pay £6.99. After buying the game i saw the poster where they had a shelf dedicated to Dead Space 2. So here the deal description.
Dead Space 2 only £9.99 when you trade-in one of these titles
Call of Duty Black Ops
Formula 1 2010
Image of poster and receipt as proof of £33 trade in value:http://i.imgur.com/C4Tkv.jpghttp://i.imgur.com/lgqry.jpg
Ahhh I'm so going to get cold for this like the tesco one but what the heck! might as well. In my opinion this is better than the Tesco deal as there limited store that actually does trade-in (trial run?)