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A bit out of date, but this interactive map of step free London is very good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 :
London Overground (East London line)
AccessAble Access Guide :
Accessibility friendly : Yes.
General description : See wiki
More comment : Step-free access (TFL). National Rail Map & Guide. Lifts to all platforms - no boarding ramps available or step / gap information available.