A good record. This is a Highlands (Alpine) Copperhead (A. ramsayi). If you zoom in on the head you can see the distinctive white markings on the labial scales (large scales along upper jaw above mouth and below the eye) and the creamy coloured lower sides along body.
Many thanks WillO. Much appreciate your quick reply which settled a discussion at http://www.johnevans.id.au/wp/20-march-2022-mt-gingera-from-corin-dam/ . Cheers. john