Tinkerbell - on nap days i get him down at around 1.30pm (if he got up at 7) & prob nearer 2pm if he gets up 7.30-8. If hes had 3 no nap days in a row & gets up at 9am on day 4, id still prob try him for a nap at 2pm as he will be tired enough to take it. Whatever time he goes down, i will wake him by 4pm if he's not woken himself. These days he's averaging 2hr naps & waking naturally most of the time. Then he's into bed at 7.50pm & usually asleep by 8. I certainly dont think wed have such easy bedtimes if he was napping that every single day though.
Wrt your dd's current routine, tbh if shes napping every day, & gets up at 8am, i'm not surprised her bt is stretching towards 9 - thats a 13hr day & 11hrs of nightsleep which is pretty much the norm at this age i thunk? Seem to think its roughly what vicky's Sam was doing for ages too? Another option if you want an earlier bt wld be to gradually wake her earlier in the mornings so as to shift naptime & therefore bedtime earlier too? Tbh tho if you are already waking her at 8am i'd leave her to it, & try offering nap every few days based on behaviour instead. She may just surprise u!
Things may be about to change here now he's in a bbb. The last 2 days hes woken pre 7am, we've not had that in a few months. If he continues waking earlier we will end up doing naps every day again, which on the one hand is ok, but on the other i expect it would lead to similar issues to those you are having ie late bt's. & since we've been coping quite nicely dropping the nap days naturally, it feels like a step backwards yk?