Why anyone would think they would love 379 from an area they run regularly, where all depots sign them, to somewhere they don't really ever go, with crews that don't sign them, for a few months only, because.....? West Anglia deserves decent trains to ya know, not just the precious Anglia passengers
As I see it, the plan is surely going to be straight forward, no legacy stock will be moved from its current areas, simply replaced as new stock comes online. Anything more than that is unnecessary faff.