So - I've been trying some very amateur sleuthing on the species list, and got excited because I thought this could have been guinea flower subsp ericifolia (especially as Betty has a photo of one in this area), but I think it's lesser guinea flower?
It could be either. Toelken has not yet published a definitive journal article about these two species on the tablelands and ACT. Until/if that happens, we are calling hibbertias like this Hibbertia sp. in the ACT.