There are 2 locations on Farrer Ridge that havevery similar looking species. I first thought it was A. boormanii, but the phyllodes seem to be too long and they are trees rather than bushes.
I've taken a few more photos of immature flowers. I hope this'll make things a bit clearer. By the way, if this turns out to be A. dawsonii you might also want to have another look at the other acacia I spotted on the same day (currently logged as A. boormanii). They looked very similar to me.
I have decided it must be Acacia boormanni on the following grounds. The 'leaves' point down (never in A. dawsonii). The branchlets are not prominently ribbed, and nor are they hairy, as they are in A. dawsonii. The 'leaves' do not have prominent resinous ribs, as does A. dawsonii. However, before anyone starts pulling them out, a specimen should be checked by an expert. There is only so much one can infer from a photo.
There is also Acacia boormanii on Isaacs Ridge and I am taking a specimen to the Herbarium. Actually I am taking in seven non-local acacias so if I started removing them there would not be much left!