Another conclusion, if more people were willing to walk up longer than average escalators, there would be less congestion at peak hours.
Lifts are of course perfectly acceptable for the diagonally challenged (wheelchairs, prams, whatnot).
Or just get rid of escalators entirely.
Many of the stations are very deep - the equivalent of a 15 storey building. Changing to stairs would certainly lower throughput because that's a really long climb.
I find that incredibly hard to believe. Assuming 4 meters per storey, you are saying that the London underground stations are at a depth of 60 meters.
If true, that's really amazing.
[1]: https://en.wikipedia.org/wiki/London_Underground_infrastruct...