(19 Aug 2023, 10:44 am)L469 YVK wrote B9TLs could then be allocated on the X14/X20 only. And with no evening & Sunday service (except the Sunday X14/X15 board which could be worked using E400MMCs), would at least conserve the B9TLs.

Neither of those routes are easy. Easier than the X93 sure, but the X14 is essentially all NSL running with lots of hills and a 9 minute blast flat out on the A1. The X20 is flat out from North Seaton to Gosforth, again not ideal for buses which are struggling already. 

The current 14/64 plate E400s can just about handle them both, but then they haven't been nailed on the X93 for their entire lives. 

If the B9s are to be moved, then realistically they need put onto something far less strenuous such as the X46 as Storx has suggested.