What is the Tube entrance called at Heathrow? Is it in the airline terminal? I am reading it is the Underground Station.
The tube or subway is called the Underground. A typical direction sign within a terminal at Heathrow is shown below.
The London Underground logo is used everywhere in the signage.
There are three stations:
- Heathrow Terminals 2&3
- Heathrow Terminal 4
- Heathrow Terminal 5
(Note that 2, 3, 4 and 5 are the only terminals: Terminal 1 closed a few years ago.)
The station for Terminals 2 and 3 is between the two terminals and is reached by clearly signposted pedestrian tunnels. The stations for 4 and 5 are in the corresponding terminal and, again, clearly signposted.
There is more information on the airport website.