Found some more
here. Size and shape seem to match.
OK. The print was spotted at Walters Arena, better known as Seven Sisters off-road site. It was in the large car parking area near the main entrance. There was no evidence of human footprints there too so whatever it was was not on a lead - and had not been there long either looking at the weather!
We camped on site over the weekend but saw no other signs of any "beast".

If you are there for a winch challenge, rally etc., watch out.

Chris