He may well need a couple of night feeds until he's consistently moved his calories back to daytime.
There are a few ways to wean feed to sleep. None are easy or quick. Consider that for his entire life, this is how he's gone to sleep. Depending upon his temperament, it will take around a week probably before you see improvement, then just as you think you've succeeded, he will probably regress (babies are little scientists, experimenting to see if this new world order is here to stay) and the key is to be consistent through the regression with the same methods you used for training in the first place and you'll be through that in 2-3 days usually. Things will still go off the rails occasionally with development but should be smoother within a fortnight to a month.
Here's a link with some information re: gentle removal of breast feeding to sleep:
https://babywhispererforums.com/index.php?topic=52857.0Here is a link to "teaching sleep to babies over 6 months":
https://babywhispererforums.com/index.php?topic=85498.0Our plan is to move the feeds around & do some holding to calm pre sleep then PU/PD. Could I try with naps & bt & early NWs or do I need to be consistent as he will need at least 1 night feed.
This is certainly a reasonable plan, made by sensible parents who know their baby best. You can try shush/pat before PUPD - PUPD is a method of last resort when shush/pat or a suitable variant has been used for at least 2 weeks with NO improvement. It can necessitate more night feeds as it takes a lot of energy for LO. WRT night feeds, I would suggest deciding before you go in at each NW whether you will feed or not. Feed immediately and get back to bed if you're going to feed. If you're not, don't feed until he's fallen asleep. This is incredibly hard but it will mean he has less reason to keep protesting and will learn faster that if mum doesn't feed straight away, he won't be fed and might as well sleep. I'd base feeding or not decision on two things:
1. Has it been 4hr since last feed? If yes, feed. - This timeframe you can increase for the long stretch of sleep as you get further through the process.
2. Can I stick at it? If you are exhausted and think you may well feed if he's awake still after 30mins, 1hr, 2hr, just feed - that is how you are most likely to be consistent.
When I did this with my DS, he was older than your DS and we'd fallen slowly into more NFs than I care to remember and he screamed for 3hr. He is an extremely persistent spirited child though. It only happened once and we did wean the NFs (he was >1yr old). I say this not to discourage, but to say I've been there, its tough and can be emotionally draining in the moment. That's why I say the "Can I stick at it" caveat to your decision re: whether to feed or not.
I'm happy to hold your hand as you go through this process. I think your routine is reasonable and everything else is in place so it should go relatively well.