Ian F. wrote:

Has anyone had the misfortune to use this appalling service lately?
Yesterday morning, it took 25 minutes to get off the airport and to anywhere
vaguely resembling a hotel, having picked up at Terminal Two, then going to
3, then pulling into a bay somewhere odd, changing drivers, going through
vast swathes of airport roadworks, into uncharted bowels and tunnels,
stopping at dozens of traffic-lights...and eventually to the exit, through
the main tunnel and onto the A4 Bath Road!

I'm curious about these uncharted parts - just what part of an airport
is its bowels, and how long were the tunnels?