Just a quick update Zoe.
We had that it was developmental with a bit of OT thrown in, went with longer nap for a bit and Sunday Monday Tuesday mornings got 6.10am/640am(!)/ 6am WUs and we didn't know ourselves!
Then Tuesday night he was up in the middle of the night for 1.5hrs, completely hysterical and we don't know why, could have been a nightmare. He only slept for 45mins nap next day (Wednesday)in daycare, 7pm BT then Lo and behold back to 440am WU this morning....
As frustrating/tear inducing/disappointing as that is this morning, our comfort is the fact that it looks like classic OT, he didn't catch up during the day yesterday for that big NW the night before, and we know what we need to do today (75 mins + nap to try and catch up). Plus in the back of our minds we know (hope!) it's developmental and will just have to ride it out for a few more weeks...
So sometimes it feels like 2 steps forward and 1 step back, but at least we think we know why it's happening and this at least helps us cope a bit mentally.
So thanks for the pointers and fingers crossed we will get back on track.