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This technique was actually developed by Raychem in the early 1980s and since then thousands of km have been installed.
The product line is know owned by AFL
Near to where I live,quite a few years ago, at least 20, there used to be a fibre-optic line wrapped around the top earth wire. This the 132 kV Connah's Quay to Hawarden, Wood Lane sub-station line.
It is conceivable that the claim is a new machine that can climb over post-type insulators found at MV on certain types of line construction, albeit I suspect with the line dead.
It is also worth noting that on the UK supergrid, the Earth-wire wrapping machine could operate with the lines live, as long as the towers could be safely climbed live. The technology is fairly old, but the application may be new. It would be interesting to see an “unwrapping machine” at MV. These need far more precise control, and could (and sometimes did) tie themselves to the line with a large knot of the fibre Optic cable they were supposed to be collecting, resulting in the machine itself needing to be rescued!