IIRC MT fleet vehicles don't need a car pass - just the MT docket is sufficient. (Edited coz Level 28 posted whilst I was two finger typing!)
However, taking Wannabees thinking one stage further if all visitors have to come through the main gate and past RAFP / MOD Plod / SERCO or whoever then why do we have to lock secrets away at night or indeed need combination locks to get into the Mess / barrack block etc. Surely everybody has been checked ....
Memories are short.
Back on thread - with regards to the car park at Brize. Use MT. Thats what they are there for. And again, IIRC, deploying on ops is one of those rare times that MT will come and pick you up from your house regardless of whether it is on base or off base. Or at least they did at the only remaining flying base in Norfolk!