Thanks ladies for sharing your experiences and normalising what I'm going through. I don't think I can stretch her out much later on the morning as she's waking between 5.30-6am (I attempt resettle until 6-6.30) and consequently she's exhausted and ready for bed by 9-9.30am and goes down easily.
My DD hasn't been a napper in the pram since she was tiny but we do go for long walks in the afternoon for both our sanity. Occasionally she'll fall asleep in the car in the afternoon and I will drive around until she wakes, this isn't ideal but maybe worth doing to get through this period?
I'm loathe to wake her from the morning sleep as sometimes she only sleeps just over an hour anyway and still refuses the 2nd nap. In desperation I have let her cry for short periods of time but it doesn't sit well with me when she's such a brilliant self settler for the morning nap and going to bed (& it doesn't necessarily work anyway!)
Seems I'm stuck with the long arvo stretch until she either decides to resume the 2nd nap or can stay up a bit later.