It wasn't the unions trying to get rid of the train guards, it was the management. We have been waiting for management to face up to facts, not the unions.
The idea of having 300 members of the public in four compartments supervised by one person in a dangerous environment is ludicrous. If that was an employer with 300 workers and one supervisor underground that would be rated as grossly understaffed and an obvious breach of health and safety. Even above ground it is highly questionable, there is no backup with only one person in charge, drivers have collapsed in the past.