Interesting article... and choice of image, it would seen! It would be far better to have used the wooden pole examples that carry overhead power lines, rather than pylons!I had wondered why they used the tall metal lattice towers, the only lights on them round here are the aircraft avoidance beacons on the Tynemouth crossing.
Where wood poles are being replaced, often the existing poles retain the telephone cabling (as there is less structural load) and the new poles only carry the power cabling but at a greater height than before. This arrangement was implemented in my village a few years back.In one case of undergrounding in Bamburgh, Northumberland the wood poles were sawn off to the heigh of the street lighting and new control boxes fitted and cables run underground. Only one new column was used and this was where a steel pole was fitted.