Sleep routine

[Nessynoonars]

Hi all, my 18 month old has always been a good sleeper... Going up to bed at 6.30 and normally asleep by 7pm waking up between 5 and 6am... Now he is waking at 4am and also not napping for long during the day 45mins maximum. I have tried later bed time but still wakes early and has more of a disturbed night. Any advice would be much appreciated 😊

How long has he been on 1 nap? Sounds like he's not getting enough in the day so it's affecting his night sleep

He has been having 1 nap for about three months now as would not go down for two naps. He was sleeping around 2 and half hours until recently.

He's probably still transitioning. If they don't get enough sleep in the day it completely messes up night sleep.