Day time airliner parking Heathrow
Both Qantas and Cathay Pacific have aircraft that park-up all day before leaving late evening. Not all of their flights do this however, so is there a regular pattern as to which arriving flights layover/park-up and which turnaround in the usual 3 or 4 hours? You can't rely in flight numbers alone as they could switch aircraft between obvious flight number pairings.
I ask this because I'm always seeing a Qantas A380 and Cathay B747 parked up between T4 and T5, but never get to see which aircraft they are. The movement sites don't always make it easy to work out which ones they are.
Any information would be of interest.
Thanks.