On the advice of my FEO, when I needed to dispatch a caged fox, I called 101 and got a CAD number, so if any neighbours complained about a "man with a gun" in my garden, the old bill would have a record of it.
My dog was going bananas at about 4.30 the other morning, so I went down and there was a largish vixen in the cage trap.
I called 101 at 4.40, got a CAD number, then when the deed was done at about 4.50, I called and asked them to close the CAD down.
Neither the first person I spoke to or the second person seemed to have the slightest idea what I was on about, but at least I had cover