All the London railway stations :
Ewell East is on ThamesLink with some accessible access to platforms.
Step-free access to platform one (towards London) is via a ramp adjacent to the station car park.
Step-free access to platform 2 (towards Epsom/Horsham) is via a 200 metres undulating public footpath and short ramp, the footpath being steep in places.
Access between platforms is via ramps, footpath and pavement (approx. 520 metres, steeper than 1:10 gradient).
National Rail : ThamesLink
Accessibility friendly : There is no step-free access to the ticket office and platforms. Nearest step-free station is Epsom.
General description : See wiki
More comment : National Rail Map & Guide.