Some useful guides that we have found helpful in the past:Transport for London getting around London guide (Large Print)Step free tube guideAvoiding stairs tube and DLR guideAudio Tube mapBlack and white large print tube mapColour large print tube mapHope these can help others.Paul PS. I'll post part2 when time avails.

Which cities have you found particularly accessible? Please provide details on all aspects that will inform other travellers.