Just to put a different point of view out there, because this place is full of people who appreciate telecoms...
There will be members of the public that has no real appreciation for how telecoms works, has never stopped to ponder why there are street cabinets, and just expects stuff to work.
He has bought a nice suburban house with a historic wall outside, that is no doubt protected / listed / conservation area and as the current resident they would get into a bunch of trouble of they did anything to impact the appearance of the wall.
Is it reasonable he has raised a query whether the street cabinet that has popped up should be positioned in front of the historic wall? You could even say he's been more reasonable offering space to host the cabinet elsewhere on his land. Whether it was sensible to get the local rag involved and do a Mr Angry about a street cabinet article, but charitably you could acknowledge that he's trying to look after the local area and query the placement of street furniture.
Provided that he doesn't hold some long term vendetta against the cabinet now that he's been told it's all legit and.its not moving, should we support members of the public who sensibly query stuff like this?