As soon as dispatch is involved the person needs route knowledge, and assessment on that route, and safety-critical training and all the other historic aspects of guards. None of this serves any purpose to passengers or is necessary these days when the driver is operationally in charge. If the person is restricted to this route or that route, they are not truly flexible. If the driver cannot dispatch a train without them being present, ‘exceptional circumstances’ clauses, however tightly they are written and controlled, can never work to keep trains moving in ‘exceptional circumstances’. It is basically saying the platform checking duties are entirely customer focused and not essential to train movement. Putting safety responsibilities in simply stacks the odds against the employers and in favour of the power of the RMT to prevent the train service running, so why would they look to compromise on that?
How much by fluke or design it is unclear, but Southern’s operating model could be held up as an industry benchmark for achieving operational performance improvement while considerably benefitting the actual conductors who were affected and are now better paid OBS. Perhaps the amazingly apathetic response from the government and the media to the South Western strikes is because the changes they propose have been shown to work well on a neighbouring train operator.