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A bit out of date, but this interactive map of step free London is very good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 : Hyde Park Corner is not accessible to wheelchair users due to escalators between the platforms and street level. Certain entrances also include additional stairs (from the Hyde Park and Grosvenor place entrances) before arriving at the escalators of 26 or 28 steps. The Knightsbridge entrance, and the booking hall are step free to the escalator.
Escalator access between street and platform.
General description :