Is it an Ash tree?
I had a large-ish one in the garden last year that we had to chop down, but we have a smaller one coming up now. The large one obviously self seeded all over the place too, because tiny plants have been popping up all over the place.
It goes very red in the Autumn, and loses its leaves in Winter. It has soft, furry stems.
Any ideas? (I hope it's not an Ash because I really love it
)