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A bit out of date, but this interactive map of step free London is very good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 : Central
Accessibility friendly : Partial.
You need to use the correct entrance/exit depending on which platform you are travelling from/to
Level interchange between platforms is via the street.
Use Snakes Lane East/Madeira Grove entrance to access westbound platform 2 towards Stratford - this is open until 2100; use intercom to ask staff to unlock gate at other times.
Use Broadway entrance to access eastbound platform towards Epping.
General description : Eastbound towards Epping (B step 90mm/gap 163mm), westbound platform 2 (majority of trains) towards Stratford (B step 87mm/gap 177mm).