Completely forgot to mention this earlier.
It came from a Deptford driver and it was being shared with members of the public - so take it with a pinch of salt if you wish.
Apparently an order for new vehicles has been messed up.
Volvo engines have been added to the buses in the factory, rather than the ones that had been requested.
So, the vehicles have gone back to the factory to have the correct ones fitted.
RE: Go North East: 2015/16 Financial Year Order Predictions
'Illegitimis non carborundum'