To see if there were several types of ants in the garden, we put a drop of honey and a fragment of chicken on the brick paving, and photo'd the ants that turned up. Not sure if these three are the same or three different types. Abdomen on one looks more pointy.
Hi Watermilli, I'll label this sighting as Iridomyrmex species, as this is what the first two photos are. The third photo is of an Anonychomyrma species. Cheers, Jon