tunnel 3
The tunnel to the Heathrow Express that you have to walk down after you've arrived at Terminal 4 and need to get to the bus station. This is the first tunnel. There's about 17 more under terminals 1, 2 and 3, which will add 27 minutes to your journey, which will means you'll miss your bus which will means you'll have to wait 2 hours for the next one which is perfect after a 10 hour flight.
Heathrow, London, UK
tunnel 3
The tunnel to the Heathrow Express that you have to walk down after you've arrived at Terminal 4 and need to get to the bus station. This is the first tunnel. There's about 17 more under terminals 1, 2 and 3, which will add 27 minutes to your journey, which will means you'll miss your bus which will means you'll have to wait 2 hours for the next one which is perfect after a 10 hour flight.
Heathrow, London, UK