Def a Senecio, this is an exotic african species listed as formerly established in the ACT. Fantastic that it is back of course ;). Mike, worth removing if you are happy to.
Maybe we should change the common name of 'Dimorphotheca ecklonis (African Daisy)' to Cape Daisy. It is given both names in the ACT list of naturalised and doubtfully naturalised alien plant species. I've always called it South African daisy. Common names can be confusing.