I can't decide whether it is a maple or a snowball bush.

Sycamore?

Tug thank you so much for your suggestion. I looked up snowball bush and its clearly different from what's known as that in Britain, the Guelder Rose, Viburnum opulus. This explains my puzzelement at an American friend's post.

actually it does look like Viburn opulus too.

or even a currant?

Sorry, Yorkslass. A currant would have leaves one at a time, rather than in pairs, like the picture.

I have just bought a couple of V. opulus today and they look just ike these. I've gone for the straight species as I want the berries too.

Shucks Tug, that's a thing I never noticed. (Too much attention on getting rid of blister mites and picking the fruit...

Good luck with that Eileen. I dug mine up after a number of years - it flowered well but had so few berries it wasn't worth keeping. It didn't respond to threats as plants occasionally seem to do. May have been a pollination problem as I haven't seen any more around here.

this is a good plant for moths too and that is one of the reasons we selected it.