Earthed electricity pylon

Having figured out that the top wire is the Earth wire, I was wondering how it was wired to the ground. Did it go through the metal framework? I found this example at Chester Services on the M56. If you look carefully at the point of the pylon, there is a junction taking the wire down. Then there are pegs down the left hand side that carry a wire down to the ground. There was the same on the far right.