To add to the debate about 5258...
It is entirely possible, if the vehicle was not in service, that the destination displays were being configured in the depot and an engineer has used said vehicle as transport down to Front St to see what the problem is with another vehicle. The engineer could have forgotten (or been unaware, if someone else usually configures the destinations) that '50 SOUTH SHIELDS' (or whatever the terminus was) was on the display.
RE: Go North East - Latest