My local TPS stopped serving to the public a while ago, I do have a friend with an trade account and they even rang him to confirm they knew me!
Apparently the chap serving me told me that somebody had gone in and booked out parts against a garage but he didn't work for them, so free parts for him, cheeky bugger..
I now go via the main dealer, which I have a friend who works there, so still get a little bit of discount.
Personally, I just hate the showroom visit for parts. The service isn't the best as they wish to sell new cars not random bits for a 10 year old GTI.