Originally Posted by
KARFA
There is no one transit system that stops at all the stops. HEX is 123 & 5, Heathrow Connect is 123 & 4, the tube is either 123 & 5, or 123 & 4 depending on which one you get. No one train/tube does 123 & 4 & 5 in one go.
Technically correct but if you are in Piccadilly you can get a train (not the same train) to all terminals, and if you are in Paddington, same. But from Farringdon you won't be able to go to T5. Bit annoying.