In article ,
George wrote:
Anybody who uses the tube regularly will know that the very idea of
wheelchairs on the tube is a non starterc[...]

At peak times, that may well be true. But there are many bits of the
tube that are accessible and, I'm sure, are regularly used by
wheelchair users.

TfL even publish a guide with detailed accessibility information:

http://www.tfl.gov.uk/assets/downloa...-guide-map.pdf

-roy