Regarding Ashington, I am guessing Arriva are waiting to see what happens with the Ashington Line (I am willing to take a punt that it won't quite live up to expectations for various reasons - principally that it is currently set up for car users).
That aside there is no doubt Arriva's new owners will need to open their wallet soon. Make no mistake, the SB200/DB300 Wright bodied busses have given excellent and long service, and aged far better than their Scania predecessors. But they are getting tired now and replacement must be on the cards.
RE: Arriva State of The Fleet