Most trains through Camberley are 4 carriages long - on platform 2, only two peak evening services on weekdays, and possibly the last train of the night, are longer. Now that the platform has been lengthened, all trains stop at the front end of the platform, which is furthest from the exit and the overhead bridge. This is frustrating in the rain, or for anyone rushing to catch the train. A '4-Car Stop' sign, such as many other stations have, would enable the shorter trains to stop more conveniently for the Platform 2 exit and overhead bridge to Platform 1 (and the ticket office. when open).
I've passed your feedback onto the station's management team as I'm not sure of the process of installing a new stop sign.