Sandown won't be used for club events as it is a direct conversation from ToCA Race Driver 3, a Codemasters title - therefore it is an illegal mod (breached copyright). Same goes for any other tracks converted from a codies title.
@ Kris - Atbierbude is indeed a goldmine for GTL fans! Don't worry too much about skins though as we only use default skins in RD GTL events (too much hassle to get everyone to have them to avoid server mismatches).