Oh dear just wrote a long reply and deleted it - I'd confused myself! (((Hugs))) it can be so frustrating, can't it? Did he have his usual 7om BT last night? I do wonder whether he kind of crashed out and did a slightly short OT night - I'm guessing he had around 12.5h total sleep? I still suspect he needs around 14.5h, just based on those days with the good nights. Would you mind posting the last few days, I know you've been through them all already but I'm struggling to match it all up together so if you could lay it out as before then perhaps it'll make something a bit clearer? I do wonder whether, that night when he had the 1.5h waking, he'd been a little more refreshed after his slightly better night previously, and that's why he only napped 1.5h in the morning, but then had around the same in the afternoon which ended up giving him a bit too much daytime sleep, given that he'd had a slightly better night?? Perhaps it might be worth starting to push that first A time a little now? The trouble with long morning naps is when they use them to catch up on sleep from a poor night, but as I think Lily already said, if the A time is long enough then that shouldn't happen. But I'm thinking, if he does better on a long morning nap, then as you head towards the 2-1 (a long process, as you probably remember from ds1!), you'll be wanting to push that first A more than the others. Pushing that A out would then help with getting to the second nap after the school run (provided of course that he still does a long first nap), and he wouldn't need a long A to BT. Maybe he's already telling you he wants a longer first A, with those EWs? What do you think? A new direction, perhaps?