She was on a teams call apparently. She could have dialed in and turned to mute, so there would be no video or audio of her. Or she could have joined the meeting without activating video and again been on mute. Either way, not sure what use it would be. It almost just adds to the mystery
I read that the dog was found running loose in a distressed state by another dog walker. They found the lead on ground between bench and river and tied the dog up as they were in a rush to get home for an appointment.
I really doubt people are burning plastics mate, it would likely kill them and the ash / residue would be highly toxic and add to their woes.
Probably more likely they are burning wood that has been treated, painted etc, poor quality stuff lifted from skips etc. Not that burning paint on wood...