Search london history from Roman times to modern day
A bit out of date, but this interactive map of step free London is very good
All the London railway stations :
Underground lines : Piccadilly
AccessAble Access Guide :
Accessibility friendly : Knightsbridge is not accessible to wheelchair users due to stairs AND escalators between the platforms and street level. All four entrances have stairs of between 24 and 29 steps, after which there is one escalator plus one more flight of stairs of 20 steps.
General description :