(11 Mar 2017, 6:18 pm)L469 YVK wrote Anyway, here are my predictions:

Ashington:
X21 / X22: PVR 15 - 12x E400MMC + 7522,23,24 with 7525 as spare

Jesmond:
43/44/45: PVR 10 - 9x E400 7501-09 + 7518 and no spare due to the fact that if 7501-09 had not have been chosen to be upgraded to Sapphire, then these routes although receiving newer vehicles wouldn't have benefited from such cascade otherwise. Therefore, a  normal specification but reasonable quality double deck vehicle would suffice as a spare.

For the next moves, there are currently 6x Pulsars available for Sapphire service 7 between Darlington and Belmont as well as an additional one available at Jesmond. The moves would mean that with all 7x being put to use, the following Sapphire single deck vehicles consisting of (correct me if I'm wrong and they're used albeit with out any branding for the supposed routes) 1479, 1517 and 1595 would become available as spares.

Belmont / Darlington:
7: PVR 10
- 8x E400 7526-28 + 7534-37, 7540
- 2x Wright Pulsar 2 1522-23 with 1479 as spare at Darlington not respective of where the main 2x are based due to the higher number of boards being operated by Darlington

Belmont:
22: PVR 5 - 5x Wright Pulsar 2 1512-16

After the above, it would then leave 2x spare vehicles covering a PVR of 32x (7, 22, 23, 24) out of Belmont Depot. However, the number of spare vehicles could be increased should more become available if surplus and refurbished if needed.