The official cascade plan was last seen as follows:

7515/6/7/53/4/5/6 all AN to JE (the first three being specifically for Nexus schools as they meet the new EuroV contact minimum and are not planned to have EuroVI conversion).

7510/1/2/4 all AN to DM replacing older DDs (presumably temp arrangements given these are all life expired also)

7508 also JE to DM, same reason as above, as this one also hasn't been EuroVI converted, whereas its sisters have (which is why they are staying put).

All AN Solos withdrawn (or cascaded further to remove older examples if needed). Most JE Solos withdrawn, except 2601/2/3 and 2837 for now.

Some Pulsars from both AN and JE to reserve, which presumably will cascade into Durham County somewhere.

All 74xx in North are withdrawn. Some 74xx withdrawn in Durham as replaced by the small numbers of incoming E400.

No plans for 7424/5/6 at Redcar either, although I was originally told that 7425 was withdrawn due to engine failure, but it appears to have been refitted with a new engine, which tells you all you need to know about their intentions of maintaining their use for a while longer...