The other thing to consider is if it is Austrelaps, then the only one around this region is ramsayi and in both Austrelaps the diagnostic character to confirm id is the pale anterior edges to the upper labial (lip) scales, never present on Pseudechis. The pale edges give an appearance of white lips or teeth, not to be confused with the white line on the smaller, White-lipped Snake. That's why we prefer an image of the face, have a look at the picture of one to get your head around what I mean.