This may be a stupid question, but what training do you need to dispatch the train?
If the platform is clear, and all pax on board, could the OBS then not inform the driver all is clear?? Os are things not that simple? surely thats what the cameras would have done?
Was on the same journey a few weeks ago when the cameras stopped working. The driver walked the length of the train to dispatch it at a few stations and said he couldnt be bothered to keep doing it so train cancelled at redhill. again....there was an OBS on board.
Like with most things, it's not difficult as such but does require proper training, the technical side of it (buttons, bell codes etc), proper route knowledge, emergency procedures etc and so on.
On your second question - to an extent this can work but the cameras are needed for one last check before power is taken - even in the old way of doing things. And in any case, surely if you are "modernising" then you should make sure cameras are of the best quality and fully functioning 100% of the time before you implement a new policy in a rush to appease the Dft?