yep typical of the unions in this country back then. a similar ploy now being done to stop driver only trains. As with everything they play the H&S card, a driver can't possibly look after the doors as well as drive the train despite the fact underground drivers have been doing that for ever!
It was one of the reasons the ATP was killed off as they couldn't be redesigned to allow two seats like the 125s could. I wonder how long the 125s ran with two drivers?