I found this undated publication several months ago while researching
the availability of public toilets at London Underground stations.
A 77 A4 page version can be read or downloaded at
www.tfl.gov.uk/assets/downloads/Getting_around_London.pdf
My second attempt to get the 146 A5 spiral-bound paper version from TfL
has just succeeded. (The first attempt at pots://020 7222 1234 went into
a black hole. The second at
https://www.tfl.gov.uk/tfl/contact/default.asp?type=tfl succeeded
after nearly two months.)

It primarily provides information for wheelchair users of buses and
tube. The specific information for the tube is comprehensive. Train and
other mode information is token.

I have queried TfL customer services on the failure to mention toilets
at Old Street provided by London Borough of Islington. Other local
authority provided toilets at Bank and Piccadilly are mentioned. It does
not distinguish between such toilets outside the gateline and those
inside such as at Farringdon and Baker Street. Just to reduce my Zone 1
bias, Acton Town is reported to have toilets and a taxi rank, too!

Does anybody here know a better or competing source of information on
Tube station facilities? e.g. Somebody might have a list of platform
numbers.
--
Walter Briscoe