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A bit out of date, but this interactive map of step free London is very good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 : London Overground (East London line)
AccessAble Access Guide :
Accessibility friendly : No.
General description : See wiki
More comment : National Rail Map & Guide - Step-free access to platform 5 only via gate. One step from street to Ticket Office only.