This is happening most nights now. She'll go to bed around 7pm and will usually wake for a feed around 11/12 and then she is awake until 2/3am. Wide awake! I don't turn the light on, I don't talk to her, I do absolutely nothing different to what I did previously but she just will not settle. She co-sleeps for part of the night - either from this waking or the next one. I have no problem with the night feeds, she's still little and it's expected but being awake for that length of time is becoming unbearable. I'm consistently only getting 3 or 4 hours sleep a night.
She is 8 months but 6 months corrected, although she's smaller than a typical 6 month old. She was only recently taken to solids and she's having a small amount of vegetable purée in the evening. Oddly, it seems to have been since she started solids that she's been unsettled, is it possible that it's giving her an energy which she's feeling the need to work off in the middle of the night? Maybe I should try giving her solids at lunch time instead.