All the London railway stations :
Elstree & Borehamwood is on the ThamesLink network.
This is a Category A station: This station has step-free access to all platforms.
A staff-operated ramp is required for step-free access between train and platform at this station.
See pictures and further
accessible transport in London detail from links below.
Accessibility friendly : Partial station. Newly built ticket office providing level access from the street. One window has low level counter. Step free access to Platform 1 (southbound).
General description : See wiki
More comment : National Rail Guide & Maps