(14 May 2015, 6:11 pm)AIG20 wrote I assume its related to delays caused by the roadwork's which are effecting the majority of the routes in Newcastle. Sean Blair states that a "third" vehicle will be joining 16833 and 16839 in the coming days, and they are being used to cover late running buses on the 22/X63/62/63.

Due to low availability of the Enviro 400s these two have been brought in to help make run out on a morning. Get taken off as soon as spares become available from engineering. Seems they were being used to cover mileage today on various services!