(11 May 2015, 5:41 pm)Michael wrote All unaccounted for, if GNE gets all of them, the total will be 19.
Personally, I think it would be illogical to assume any further arrivals from Brighton & Hove will be from their '03 plate series, given that Go North East has acquired some of the first '04 plate series Scania OmniDekkas from B&H.
It's quite clear that the Scania OmniDekkas have been allocated fleet numbers alphabetically in registration mark order, hence the gaps with 6129 and 6131. 6128 carries registration mark GX03SVC while 6130 carries registration mark GX03SVE. Brighton & Hove have 613 (GX03SVD), so I think we can assume that this will be 6129. Similarly, 620 (YN04 GJF) for 6131.
So, in addition to the established twelve (with ten having arrived so far), there's plenty of scope to make up 21 buses from B&H's '04 plate series examples (622 - 636).