Based on images in ALA - https://bie.ala.org.au/species/urn:lsid:biodiversity.org.au:afd.taxon:c13c14f6-164e-40e0-a441-7b185350829f#overview - matches the wasp Iphiaulax rufus (Braconidae).
Wow. Thanks Kim. I did question myself when I saw it whether it was a wasp or a beetle, but it was so colourful I went with beetle. The triangle shape at the rear and the side on view does look more like a wasp. I will try wasp and see what happens!