At the moment the issues aren't that significant for LNER so bringing a few 225s out and lopping the Scottish stuff is probably enough.If we are looking long term. Could 365s cover London - York as it stops at all shacks (in ECML terms)
365s continuing on GTR for a short period to displace 387s to GWR might make more sense but 365s can only go to Peterborough so the number of 387s potentially released is small and clearly GTR were hoping to be rid of their 365s at the end of the week so will have been planning on that basis.