Thank you so much for your advice - yes, we will definitely try the earlier bedtimes. Most days she has a nap around noon until about two, but yesterday, for example, she was so tired by 10am that we had to put her down then and she did 10.30-12.30pm and then nothing all afternoon. We had expected to see signs of tiredness but she seemed fine all afternoon and was actually more lively at bathtime than she has been in ages - looking back and following what you justsaid aboutmaybe needing another nap, she was probably OT and therefore somewhat hyperactive and that's why she struggled to transition into deep sleep.
We have been giving her paracetamol most nights when we think her teeth are bothering her and trying to hold off when we think she's ok. Aside from a bit of pain and a bit more dribbling and hand-chomping they don't seem to be unduly affecting her, so think we'll try the earlier BT and WI/WO and see how it goes.
Thanks for your help, much appreciated. What youo said makes perfect sense - it can just be a little hard to see it when you're stood there with a screaming baby!!
Best wishes,
Natasha x