(14 Jan 2018, 8:16 pm)S813 FVK wrote Chester-le-Street still have quite a high Streetlite PVR on a Sunday, so it may have been a case that there were none available and being the only single decks with that NSA system based there would give them no choice but to source a bus from another depot.
Perhaps the available Streetlites (if there were any spare) were overlooked for employee convenience? It would seem a logical thing to do given both vehicle types would show the announcements in exactly the same way.
Either way, it won't have mattered too much, even if it has broken the trend a bit.
Could be that Dan had other things to do at Deptford this morning and has used 5329 to save on mileage instead of travelling to Chester depot to then double back on himself.