I read that article yesterday, and wondered exactly what they are calling a "pylon" since none of the news sources had a picture, found out that steel structures are also called electrical pylons. Here in the US, steel structures are usually limited to transmission voltages, dunno about in Scotland.

However as an aside, I did find out about the really cool Pylons of Cádiz, a pair of very cool-looking steel structures supporting two 132 kV circuits crossing the bay of Cádiz, Spain.