Luckily when they extended platforms to 10 car lengths about 10 years ago, they stuck the 8 and 10 car stop boards on the same post, so little chance of that happening.
.....which is customer-hostile, and potentially dangerous, at stations where the entrance is at the rear end of the platform (eg Raynes park and Kingston down direction, New Malden, Wimbledon, Earlsfield and Strawberry Hill up direction, as
- there are two carriage lengths between the entrance and the rear of the train,
- people entering and leaving have to push past each other next to a three-foot drop,
- the majority of the train is not under the awning and,
- for down trains, passengers for those stations all try to squeeze into the rear carriage (always the busiest anyway) in order to be first in the queue for the barriers when leaving the station
- visually impaired people can't find the train because it has not stopped in the logical place - by the entrance.
I have even seen people miss trains at Kingston because from the top of the steps the rear of the train can't be seen.
All because drivers apparently aren't trusted to remember what sort of stock they are driving.