(11 May 2021, 7:16 pm)mb134 wrote Surely they'd want their new trains on their 'flagship' route? 

Regardless, I'd imagine there'd be issues with crew competency and maintenance at Craigentinny and Heaton. From memory, and I could be wrong here, I don't believe there were any plans to have 91s serve Newcastle/Edinburgh again, with the plan being to use them on the Yorkshire runs.

That's correct, the majority of crew that sign north of Newcastle are only competent on Azumas.