Ozzy, Aer Lingus UK have been parking on the Western Apron since they arrived in September.
You are not seeing any right now because there's only two aircraft on site and both operate daily. When the other A330 comes off heavy maintenance next month you'll be seeing one parked up again.
Anyway, I spotted a prime example of MAN's problems today. Nearly 20 vehicles queued up waiting to get airside through West Gate. Only two lanes open. That's a wait of nearly two hours for the ones at the back.