Whilst weeding today I dug up a baby tree, it had red leaves and on the root what looked like an acorn, but not quite, maybe a nut. Then I got another one, I planted both in a pot and will wait and see. Will feel a bit silly if it is an oak tree, but the leaves were red, and on the allotment next to me is a lovely red leaved tree, so maybe it was a nut from there, or the squirrels are having a laugh. Anyway its in a pot, so maybe I will have a lovely red leaved tree.