I would like to add, for information, a site to check the moon phase for that night.
www.moonphases.co.uk
I will try to add a screenshot but not sure how.
If I have read correctly:
The moon was just a sliver of a crescent moon and not the full moon mentioned initially by SA, and it did not rise til 4.24 am, so it was no 'moonlit night' at the time that he saw the man running/walking.
And for anyone who has not heard one, the following site will play you just what a screaming vixen sounds like, and you can see how she stands to scream, then moves and stops to scream again etc, just like the witness reported gaps in screaming and that they seemed to be moving.
www.earthtouchnews.com/in the field/backyard-wildlife/video-this-is-what-the-fox-screams.
I'm not aware of any evidence that any of the 3 ORPF witnesses heard LS screaming.