😊👍 I don't actually have a drill,on the other boxes I have on the fence and garage,I just used a screw and screwdriver,the box in the video in on brick,and there was a slight gap in the brickwork,so I just hammered a nail in
I can't tell if it's the same one going in & out or 2 adults. Possible they are checking it out, kinda a little late in their breeding season. Alternatively, they've got young and been there a while Ady.
Ironically, if they have young in there it won't be one or two. Nature expects losses hence they often lay 6 eggs or more. I know you feel these things very personally Ady, but you just have to let nature take its course. As painful as it can be. Magpies and Jays lose young to Sparrowhawk, so it's not all one way.