Surely UNDMs would be useless when shunting? Baring in mind that units will be articulated (and as a result, semi-permanently coupled together?) a shunting cabinet presumably isn't an option. If they make each unit into a three or four car set (with proper DMs at both ends), all the flexibility needed is handed to you on a plate
Also, like everything else on the modern railway, a shunting cabinet will cost a whole lot less to provide compared to a full driving cab with the many safety critical components and devices required.
Instructor Operator @ Upminster
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