These ants seemed larger, hairier, and more colourful than other Amblyopone ants. I don't think it was just the difficult light. They were being attacked by some small black ants. The last photo shows some very over-exposed large hairy ones in the upper left corner and some of the shiny ones on the right.
Hi Cath, I'm pretty happy these are Ambylopone australis although you don't often see this much colour and hairyness in a photo. The smaller ant might be Anonychomyrma, but difficult to tell. I would guess that both nests were disturbed and so they were all a bit cross when you took the photo. Cheers, Jon