that link I posted seems to be broken for some reason? anyway

Here is a link that might be useful: {{gwi:368245}}

compare with tree of heaven ...

a terrible weed tree here in the states ...

ken

Here is a link that might be useful: link

Looks like Rhus glabra to me. Also known as Sumac. Nice Fall color and spreads by it's roots.
Mike

Rhus typhina, I can see the fuzz in the leaf etc. picture that opens here on this thread.

I am currently fighting back some fu fu yellow and pink sumac I planted a few years back. If the regular species spreads anywhere near as well in Ireland I woukd consider removal and repeated round-up applications or whatever is used out there.

FWIW I really liked the appearance of mine. It just grew too well and more informal than the location called for.

You're right, bboy. I didn't look at it close enough.
I had one, or should I say, I still have it after half hearted fighting it for years. Just when I think I have won, it pops up yards away from the roots. A bit of a nuisance.
Mike

They are pretty common in gardens over here, mostly rhus glabra but also rhus typhina even if that one is less cold hardy. "laciniata"-forms is also common. They do send some runners up, but it is worth the extra work to have these almost tropical looking small trees

They look really like tree of heaven but they are native. They grow in clusters in Wisconsin.

I only see a vague resemblance to tree-of-heaven (Ailanthus altissima). If you are familiar with trees-of-heaven, there's no way you'd mistake the picture above for one of them.

Rhus typhina is very common in gardens throughout the British Isles. Rhus glabra less so and often in the 'laciniata' form. The fuzz points to the former.

T of H does self sow here but usually in warmer urban microclimates. It is visible along the rail tracks in London. But it is nothing like the plague it is in the US.

Here is a link that might be useful: Ailanthus distribution in Britain and Ireland

Looks like sumac, not ailanthus. Ailanthus has a gland-dot near the leaflet bases -- the pictured one doesn't.