The whole flipping place is ridiculous - compare t5 to Schiphol and you'll understand what I mean. It all up and down - like crossing the Alps! Starting at Hex station it's Up, Up, Up and as soon as you get through Security is back down down down - I'm out of breath even thinking about it! Probably much easier if you arrive by car!
If T5 is the answer - I would really like to see the question!
