Great Pictures, Paul!.
Just looking at that 4th picture.
That sort of pole is called an angle pole here, where the lines do not enter or leave the pole at right angles on either side.
But, one thing I couldn't help but notice, may it is my bad eyesight, but is there a link between the centre and the RH phases on that pole?.
You could actually place that sub-station
in New Zealand and no one would be any the wiser, it looks almost identical to the ones we use, although our fences are made of wire mesh, topped with razor wire.
On the subject of Cell-phone sites,
I had the oppurtunity to work at the Vodafone tower during it's upgrade, a couple of years back.
And I must say, them transponder arrays are HUGE when they are down on the ground.
The maintenance crew there, winched one up onto the tower, it took them ages.
Even the co-axial cable that the guys were using looked strange, it was about 35mm diameter and the centre of the inner conductor was hollow.
A bit like a shielded refrigeration pipe!.
And here was me with my little 4mm2 3C+E wire for the Stand-By generator.