And, for that matter, what did people do before the Piccadilly line opened to Heathrow in 1977?
They used the old Waterloo Air Terminal (before my time) then the West London Air Terminal on Cromwell Road (which I just remember) then Hatton Cross tube station, for bus connections to the terminals.
Dedicated non stop buses ran from the Air Terminals, at one stage routemasters with luggage trailers.
Also various other bus routes.
If you can get a cheap Heathrow Express ticket, then as of tomorrow, it is cheaper than the Elizabeth Line, even after you add on a Zone 1 tube fare.The
For many years from around 1955 there was also a scheduled helicopter service into central London. I'm not sure when that ended, probably early 90's.
That was bookeable as an add on to any normal flight ticket.
Originally the Heathrow Express was meant to go to Victoria, but that never came to fruition. That was in the 60's , the Piccadilly line extension was what came out of those abandoned plans as a cheaper solution.
Victoria was meant to have a new Heathrow and Gatwick air terminal to check in there, then take the express train.