Two ID's please

First, my arch enemy. I have asked about this one before on here, but it was only tiny wee sprouts at the time and therefore hard to ID. I have deliberately left it this year to let it get bigger so we can hopefully find out what it is:



The suspicion the last time was that it was a plum tree sucker? There is what looks like a plum tree in my neighbours garden, so that is possible; if it is, would it ever bear fruit, even though it is more of a shrub than a tree?

Secondly, is this stick



No leaves, nothing on it, and I thought that whatever it might be, is dead - however, it is flexible and not dry like a dead thing would be, and giving it a tug it seems to have a good grip of England.

I am not aware of planting it, however there is a hydrangea that has appeared very close by that I also didn't plant to my knowledge, so it could be donated to me by the plant fairy?

 

Would goat willow pop up all over the place? I have had loads of these pop up all around the same area at the back of the garden. Is there anyway to tell?

Would an ash seedling be leafless at this time of year?

 

The divining rod - could it be a peonie? I remember buying one of them a couple of years ago, but I have no idea where I planted it.........