I get that, but the alternative is to thin out or withdraw a service where there is no alternative. Or do you think spare units (on which staff have been trained) exist on the magic unit tree that TFW can wave its wand at and get into service in a couple of days? Or should they just think, what the hell, let’s keep these units in service despite the fire risk.What matters to me is the journey planning and earlier time I would need to leave home to complete my journey to take into account the extra half an hour associated with the wait for another operator's service to complete my journey from Wolverhampton and the inconvenience of being turfed off a train which I expected to be direct with my luggage.