Hi Keith
For your first question, it sounds like 'Winterisation'. Many companies put a protective bag round the coupler and connector box to prevent them being clogged with snow. The best time to take the panels off is when the train goes for an exam at a maintenance depot. The exams come up every few months (based on mileage) so trains being altered now will be ready for when (if) the snow comes.
Best wishes,
BW
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NNR Diesel traincrew
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