All the London railway stations :
National Rail : ThamesLink
Accessibility friendly : There are steps down to both platforms from Ticket Office and main entrance. Step-free side gate to Platform 1 (for trains to London Bridge via Peckham Rye/ Victoria, and from London Bridge via Sydenham). This gate is usually locked and is available with advance notice only. Please contact Southern Assisted Travel on 0800 138 1016 to request use. Nearest step-free station is West Norwood.
General description : See wiki
More comment : National Rail Map & Guide.