@Michael

My thoughts are that the de-branding process of "Laser" branded Mercedes Citaros 5298 - 5309 will commence from Saturday night and through Sunday. I cannot see any vehicles receiving branding this Sunday, as a large number of vehicles from multiple depots should be transferred around the region this Sunday ahead of the full PVR of the revised services coming into force on Monday.

Services 60 and 61 are to interwork on Sundays, using "Drifter" branded Streetlites. This means that silver Mercedes Citaros 5320 - 5324 will normally be kept indoors on Sundays, but I think that they'll be out in service this Sunday. I believe that the PVR of the Sunday 35A service is 7, so to allow 5298 - 5309 to be de-branded, it's possible that 5320 - 5324 plus two of the former "Silver Arrows" branded Mercedes Citaros (which are now in gold) will be allocated instead.

Far from confirmation, but just seems like the most obvious thing to do in my eyes.