At first glance,
Inadequate top chord ties to beam
Inadequate botton chord ties to beams
Inadequate plan bracing to beams
Bracing stops before top lift
Ladder too short
No evidance of ties or buttress
Beams propped of roof ridge
what looks like single standard picking up far end of beams
Lack of access to the boarded level at the springing level of the beams
No protection on what appears to be a HT live wire
I would guess if you could see the whole job live this list would be longer, p1ss poor scaff.