People seem to be convinced that these E200s are for the 4, but isn't the PVR of the 4, 11? It's not like GNE to order no spare buses these days.
I'd go with the E200s being for the 97, and all the deckers going to Consett for the X30/31/70/71 and 45/46/47. The 6 would then go to Riverside.
RE: Go North East: 2018/19 Financial Year Order Predictions