"Recliner" gurgled happily, sounding much
like they were saying:

What I fail to understand is why the second satellite (5C) wasn't
scheduled to open at the same time as the rest of T5. It must surely be
more expensive to complete it surrounded by active taxiways and parked
planes than it would have been to do so when the rest of T5 was also a
building site.

I suspect that the additional cost of building it surrounded by "working
terminal" is less than the cost of delaying T5 until that bit was
finished...