I took gps coordinates and photo of the same infestation today; please see my comment. I removed Bridal creepers from the same area many years ago before CNM; at that time I wasn't aware of its status (being a WoNS).
Yes, I just saw that, if this is the only known site of bridal creeper in this area then I'll keep the significance listing in the hope of raising some awareness. It seems to be extending its grip throughout Canberra, park care still hasn't got the big infestation near my place.