(23 Jan 2017, 7:37 pm)Buses98 wrote this will probably stay on x10 and x11 to allow LJ51 DJD &LJ51 DHZ and 7466 to be put on the 308 also 7472 will probs go on the x10 +x11 when it arrives at ashington

Failing to see how 7466/85/87 all need to be put onto the 308, when only 7801/2 have gone for refurbishment. You seem to be forgetting that Blyth also have 7425 which is an intended replacement whilst the hybrids are away. 7439 will likely just be providing further back up, and as such won't 'stay' on any route, it will be used wherever it is needed.