Plant ID if possible; Thanks :)

in Plants
Hello everyone, long time lurker, first post. Hope members can help ID the plant in the photos below, I'd be very grateful if so.
I've spent ages on google, asked family members and other keen gardeners with no luck.
Appeared in my border 2 summers ago as a tiny self seeder; now is around 4 foot tall with a further 2 foot of 3 stems forming a goblet shape at the the top of the "trunk". Its woody, with a circumference of about 2" at it's base. Deciduous and the leaves alternate.
Didn't want to bin it immediately as my first thought was it might be a weed or something undesirable or invasive, BUT on the other hand could be something I would want to keep.
Have popped it in a border, and now really have to move and keep, or bin it. Am hoping that the 2 photos of just the leaves are enough for someone to help, (these were taken last autumn), as what surrounds it makes a photo of the trunk/stems difficult, (but I can try if necessary).
Apologies if this is something really obvious; no one I have showed it recognises it, but I suppose we could all be as "sheltered" in gardening terms as each other!
Thanks in advance.
I've spent ages on google, asked family members and other keen gardeners with no luck.
Appeared in my border 2 summers ago as a tiny self seeder; now is around 4 foot tall with a further 2 foot of 3 stems forming a goblet shape at the the top of the "trunk". Its woody, with a circumference of about 2" at it's base. Deciduous and the leaves alternate.
Didn't want to bin it immediately as my first thought was it might be a weed or something undesirable or invasive, BUT on the other hand could be something I would want to keep.
Have popped it in a border, and now really have to move and keep, or bin it. Am hoping that the 2 photos of just the leaves are enough for someone to help, (these were taken last autumn), as what surrounds it makes a photo of the trunk/stems difficult, (but I can try if necessary).
Apologies if this is something really obvious; no one I have showed it recognises it, but I suppose we could all be as "sheltered" in gardening terms as each other!

Thanks in advance.


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If no one offers encouragement here it's coming out before it's a pussie (Dundee word) to do so!
A gift from the birds maybe.
Thanks everyone for your help.