Originally Posted by
Genius1
You will have the 'pleasure' of Pier 4A at T1, which is one of the most horrid parts of Heathrow IMO. It was designed as a temporary structure in the early 1990s to solve T1s growing capacity problem, and still hasn't been demolished

It's good exercise, if nothing else. It's like having to walk the length of T4 in MAD, only down a narrow metal tube.