Originally Posted by Roger
The Piccadilly Line will operate from LHR T123 to Acton Town, so I guess the ticket office will be open at LHR T123.
It will be odd if people have to buy a pass at the Underground station and then trek over to the HEX

.
I'm certain that there is a London underground ticket machine on the RHS of the Terminal One Baggage hall - can't remember if there was one in T4