Does anyone know if 1521 has transferred from Darlington to Belmont depot? I'm currently on it with a Durham driver driving it, just looked at the fleet lists on here and it says 1521 is a Darlington vehicleI'm guessing one of Belmont's Sapphire buses is off today and Darlington must have enough Sapphire Pulsars' for their workings so I imagine 1521 will be on loan to Belmont to cover one of their workings.
I once had Belmont based 1523 on a Darlington working once so it seems they do sometimes swap the Sapphire Pulsars around.
So chances are there will have been a non-Sapphire bus on the 7 dupe again this morning.