Thanks so much for all your advice.... I've had some success! Yesterday I was able to get her to have a 2 hour nap, but not until 2pm... today however she had a 2 hour nap at 12 noon
I think I figured out what I was doing wrong. She goes to bed at 8pm every night, and was waking briefly at 8am briefly but then falling back asleep for another hour, which I was letting her do. Today I got her up when she woke up at 8am instead of letting her sleep longer, moved her lunch forward to 11am and then by 12 she was showing early signs of being tired so I popped her into her cot and she went to sleep within minutes with less than a minute of complaining.
So yay! Hopefully this continues

She has been much happier yesterday & today after having proper naps.
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