His 1am feed never feels very long and almost as if he is just using it to send himself back to sleep, I will try and encourage a fuller feed.
You can try changing his diaper or something like that halfway through so he's taking more. I used to unswaddle, feed one side, change diaper and reswaddle, and then feed the second side so I knew I was getting a decent feed in the middle of the night.
I'm not in the UK, but from my experience on here it seems like HVs are a totally mixed bag in their breast feeding knowledge -- some certainly know more than others.
He woke and fed at 8am today so do I start easy from 8am? But that's too late for his last feed at bed as his bedtimes are perfect always fast asleep by 8pm, so should I bring his feeds a little earlier today like every 2hr 45min?
I'm probably late on this, but I'd start at 8 and either keep your feeds closer to 3 hours and then just smush the two closer together or do the 2.45 thing as well. Some variation is totally ok, I found that my LOs were generally ready for bed at about the same time regardless of when they got up. You'll just end up with a shorter nap or something along the way to compensate.
Hope your night tonight is better!
Oh and
on this:
It's just nice to hear that he is doing well too rather then "oooo he isnt sleeping through yet!" personally I never expected him to do early on.
Babies need to eat at night, most of them for much longer than "they" would have you believe.