All the London railway stations :
Underground lines : London Overground (Watford DC Line)
Accessibility friendly : Partial. Probably No.
General description : See wiki
More comment : Step-free access from station entrance to Platform 2 and between platforms only (TFL). The National Rail says differently - Step-free access from side entrance only to Platform 1 (northbound). Access to Platform 2 (southbound) via footbridge only.
National Rail Map & Guide,