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A bit out of date, but this interactive map of step free London is very good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 :
Enfield Town is on the London Overground network, and is deemed accessible to wheelchair travellers. Boarding ramps and steep ramps to train. See pictures and further accessible transport in London detail from links below.
National Rail : London Overground
AccessAble Access Guide :
Accessibility friendly : This station is accessible, except for a steep ramp onto platforms. There are also no boarding ramps available.
General description : See wiki
More comment : National Rail map & guide