Hi Ceri,
I have a 10 months old too who have had some teething issues lately. At the same time, he started to take longer and longer to settle for his naps (especially the second) and often woke 20-30min later. He also started to wake up earlier in the morning. I was uncertain what to do since he is only 10 months old, and theoretically still needs two naps, and I was not sure how much the teething was to blame. But when my DH suggested that maybe he can go to one nap per day we gave it a try.
It was a little tricky to keep him happy over lunch the first two days, but since then it is smooth sailing: he now naps for a solid 2.5 hours in the early afternoon!
Of course this may not be the solution for your Zoe, but maybe worth considering?
Kristina