With 'Manual' destination blinds (i.e. ones that are turned by hand and so only have a set number of destinations), what happens if the train moves to a new TOC/location? It wouldn't have any of the new destinations on its blinds. E.g. the 150s that left London Midland for Northern and FGW - what did they do initially about this? (Because they seemed to initially use them in the state they were in, including the existing livery).
And what if an 'unusual' destination is needed for any reason that is not on the blinds? How is that handled? (Surely this difficulty must have arisen by now?)
And what if an 'unusual' destination is needed for any reason that is not on the blinds? How is that handled? (Surely this difficulty must have arisen by now?)