I've just been to my local store in Shirley and asked the till lady to tell me which games there was for £4.99 by looking on their stock list.
The list is as follows:
The Golden Compas * Wing Island * Kororinpa * Monster 4x4 * Surfs Up * Excite Truck
You will need to go to your local store or give them a call as they are always not showing in stock on line. I managed to get 3 of the ones that are listed above and they were not priced up as £4.99 but go through the till at £4.99.