In article ,
tim... wrote:
Do many people use the train just to get between terminals, as opposed
to continuing on or changing to another train? I'd think that most
people changing terminals would use the airside buses.

I once had to use it when traffic congestion caused the airlink bus to dump
everyone at T5 and not carry forward to T123.

In fact, as that bus no longer serves T4, if that is your required terminal
you have to use HEx to make that journey every time

Well, you could use the 482 or 490 bus or the tube, but I take your point.

R's,
John