Only worked on private networks.
One episode of changing a line end termination was enough for me. No way would I climb up a ladder with line tension clamps, chain blocks and all other paraphernalia needed ever again.
Sod climbing a steel pylon in winter!
To hell what should be buried in the ground, so long as it's not me buried head first.
So i guess nobody want to share they experience?
Or nobody in this forum is working for National Grid!!!!!