Signal Change Rejected


Active member
Signal Change Rejected is a message I had never seen before. Admittedly, the first time it came up, I realised my locomotive was facing the wrong way, but the AI has never worried in the past about placing drivers facing the rear with a view of the carriage behind. Anyway, I turned my loco, but I am still not allowed to ride in cab view.
Is there something strange about BR class 121 blue & grey that I need to know?
While I'm at it, can anyone recommend a nice set of four cars with a motor at each end for suburban use? This seems to be the common practice in real life - often joined together to form a set of 8 cars on busier lines.