All the London railway stations :
Deptford is on ThamesLink, and This station has step-free access to all platforms. Ramps are available.
See pictures and further accessible transport in London detail from links below.
National Rail South Eastern
AccessAble Access Guide :
Accessibility friendly : No. It maybe yes, I would need to confirm this.
General description : See wiki
More comment : National Rail
Map & Guide
- Steps to platforms.