Power companies, local councils .... someone... is responsible for trimming the street trees so that they don't interfere with the cables.
This can result in some weirdly shaped shrubs and trees, as they trim for convenience, not for aesthetics. Very often the middle is cut out like these callistemons (bottlebrushes) in Slade Road, Bardwell Park.
I had to stop for a photo as I drove along, cos a play of light made this tree look like an old-fashioned Mickey Mouse ears hat! I didn't quite capture the same light with the iPhone camera....so better use some imagination!