It doesn't matter though, or Angel wouldn't be spending £600m on new Bombardier stock.
Way it works for Angel Trains is like this on the resultant cascades
317s - they'd be scrapped even if only they were replaced since they're life expired
321s - GA order makes them hard to place - not Angel Trains problem, don't own them.
360s - they'll be easily redeployed elsewhere.
379s - Not Angel Trains problem, don't own them, make more 321s redundant.
Pretty good deal for them all around, they get rid a pile of life expired stock, get a massive new deal on a franchise they had relatively little on before, cascade 21 EMUs which there will be no shortage of takes for, and a competitor is left with a pile of almost 100 mid life trains that they have no work for.
All it really does is make Angel trains position against other leasing companies stronger because the amount of surplus mid-life stock that is going to be around isn't on their books.
I wish Eversholt good luck with the 321s!