Didn't notice earlier mention of tennis, shows how observant I am!
The item that I mentioned:
"What about the odd post to the side of the barn, looks like two metal posts coming together at the top in an inverted, narrow V?"
The post isn't at the side its at the top, to the right of the apex of the barn roof. Also along with being a narrow inverted V also has cross struts of some sort. Some kind of aerial? Pole to support a service of some sort, electricity, telephone?
S_L