I also thought that, but would like to aknowledge climate change as a reason for species distribution expansion and restriction. Wahlenbergia stricta has been suggested. I can see that the rosette of gloriosa and stricta are quite different (seemingly smooth vs hairy, respectively) so could agree with this ID. However, the flower is notably larger and darker than the stricta nearby. Curious to know what influenced this difference if not different species...
Foliage isn't consistent with W.gloriosa. Opposite, paired and hairy foliage suggests W.stricta. W.gloriosa does seem to require a wetter and more temperature environment that is available at Mt Ainslie at the moment, it has yet to be recorded from any of the urban reserves actually.