I'd argue that an SPD/Cadet being used as a spare vehicle are interchangeable anyway, given their similar size. A B10BLE should be used to cover for a full size vehicle but if you have none of them available then next on the list should be used....
Most routes only have their PVR branded, so therefore there will usually be one bus off the road and unavailable for service whether that be due to breakdowns or just routine maintenance (or even 4 week exam), therefore Northern buses on branded routes shouldn't be classed as unusual, as that is exactly what they are for. Of course some routes don't have a brand, and therefore will receive Northern buses routinely. Some branded routes may have less than their PVR branded (the extra workings on the 39 would be a good example, albeit that route is obviously no longer branded!) where they don't work all day on the route. I know there used to be a few trips on the 27 which didn't work on there all day, just ran off a scholars service and covered for a bus that was away doing scholars elsewhere on the 27.
RE: Go North East - Latest
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