djk,
Just a bit of back-up here, from a guy that does this sort of work.
A fully Insulated EWP (Bucket Truck) insulated to 66kV, is the norm here, even with Street-lighting working, but we use it for normal Operational use too.
In the top pic, I can pick 3 Phase+ a Neutral + a Pilot wire for the Street-lighting.
Interesting Line tensioning systems though.
Thanks for the pics, Dave!,