Are you being serious? Do you really expect BA at Heathrow to be able to co-ordinate anything that has more than two factors?
That would be too easy. They prefer to complicate matters beyond reasonable belief, just to get up the ire of the rest of us.........it's like BA claim that Heathrow is theirs and no-one else's sometimes!!
And yes, 747 400CA, I also don't understand why the Airbus didn't stay in the stack for a while longer whilst simple issues on the ground were co-ordinated.
I remember a few years back when the night curfew at LHR meant that aircraft arriving before 06:00hrs had to shut down engines immediately upon exit from the runway and be towed by tug to the terminal. This happened to me several times when arriving from Asia on SQ, VS and even BA. And it could be done in much less than 20 minutes.