Arriva handing over the 685 has got me thinking, could we see GNE withdraw their almost equivalent 684? Of course GNE has a presence in Hexham which Arriva doesn't (aside from the 685), so that could make a difference. Originally the 684 only went as far as Ovington as far as I know, is there sufficient demand for it to run to Hexham? Perhaps the future is shared ticketing on the 684/685?