Weed???

Hemlock has purple blotches on the stem which is round. Cow parsley has a ridged stem and is shaped like celery with a groove down the underside. It can have purple stems but they're like a colour wash, not spotted.
Hemlock is deadly - just saying!
https://www.youtube.com/watch?v=LCMCwa3I1T4

Thank you Veggie
Other than scaring me that video hasn’t helped me identify it.
Fortunately I wasn’t going to eat it - or put it my other half’s sandwiches!

I read somewhere that Cow parsley smells of aniseed while Hemlock smells unpleasant. I rubbed a bit of Cow Parsley and, whilst not smelling of aniseed it didn't smell unpleasant. Not tempted to eat it though!

Milk parsley? Selinum https://www.sarahraven.com/products/seli...llichianum

Looks familiar to me - sure I have this somewhere

I reckon that’s it Scarlet.
Thank you . And well done

That's a nice looking plant. I might try growing it.

I reckon that’s it Scarlet.
Thank you . And well done

I have lots of those pots ....I always get some plants in the Autumn from West Kington  and spend the next few months wondering what I bought!!