Again, I fail to see what need a bus/coach driver has with a Cat 4 at Sydney...at any time. The RESA project will be completed by April or May at the latest, so there'll not even be a need for crossing the 07 threshold when the runway's active (which when the road's open at the moment you can do with a Cat 2 anyway).
I'm curious as to who you're doing your 'training' with. i.e. who's getting you out on the taxiways and runways. I'm also curious as to which 'coach operator' has drivers with Cat 4's running around. I can't remember the last time I saw a coach (in more than a decade) driving unescorted across runways at Sydney...
Sorry, but I'm having trouble believing what you're saying
