Opps, it will be more as I have completely disregarded the fact that the 43 got extended to Morpeth.

Therefore, it would stand like this

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

Jesmond:
- 43/44/45 PVR 13 - 7501-09 + 7526-28 + 7518 with no dedicated spare and a suitable double deck vehicle being used in place if required

However, due to there only being 3x 09 plate Sapphire Enviro 400s at Belmont for service 6 (7519-21), they could be brought up in exchange for
7526-28 which would in turn keep the age of the vehicles on service 6 roughly the same as well as the age of the vehicles on the 43/44/45 roughly the same too.