When you find what you want, make the deal quick, as it may not be there much longer. Check the bulletin board too, as it has many hidden treasures of its own. Greeters at the front door, greeters at the back door, and a food vendor to tickle your pallet so you don't have to run out for lunch.
There are two large halls in the larger building. You will most likely find what you need for your car here.

Next below are at least eight British Car Clubs present to serve you (and I hope I didn't miss any).

Then more parts an products, stay and browse a while.