(06 Jul 2015, 4:38 pm)Davie wrote What's happening to Arriva lately?? 1415 was on the X12 again today!
I'd anticipate that senior management - who decided to apply specific sub-branding for service X12 - have clamped down on the decision (which I assume was made at depot level) to prevent the allocation of 1415 to the X12 service. Quite right of them to do so, too.
If high passenger numbers were the initial concern, I'd imagine that it'll be getting allocated to the quietest runs.