All the London railway stations :
Chessington South is on the South West rail network, and is not accessible to wheelchair users. See pictures and further accessible transport in London detail from links below.
National Rail : National Rail South West
AccessAble Access Guide :
Accessibility friendly : No.
General description : Chessington South is not accessible to wheelchair users who are advised to contact our Assisted Travel Team on 0800 52 82 100. However access is available when station is staffed by use of key to main slope. See wiki
More comment : National Rail Map & Guide