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A bit out of date, but this interactive map of step free London is very good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 :
National Rail lines : The Station is on the C2C line from Fenchurch Street towards Southend, via Barking and Rainham.
AccessAble Access Guide :
Accessibility friendly : Yes, allegedly. There are no lifts at the station, but step free access is available to both platforms via the level crossing/ramps.
General description : See wiki
More comment : National Rail Map & Guide, the station has 2 disabled parking spaces.