The author gave an update at the bottom of the article: Sunday update: Russ from Open Infrastructure Map has knocked up some code which generates a precise map

The author gave an update at the bottom of the article: Sunday update: Russ from Open Infrastructure Map has knocked up some code which generates a precise map of Greater London's pylons. Thanks Russ! Link to Russ' update https://overpass-turbo.eu/s/1mYa https://overpass-turbo.eu/s/1mYa