Any help IDing this please

[Raindancer411]

It’s grown by my pond since I moved here 11 years ago and the area is relatively dry. Thank you

It looks like angelica archangelica

I think this is cowbane. Cicuta virosa, also called water hemlock.

The roots are quite poisonous but eating any part of the plant could be lethal.

I just saved into ‘my photos’ and did ‘look up’ and it tells me it’s wild carrot.

Cowbane is part of the carrot family and often confused with wild carrot.

My vote is for hemlock -
poisonous

You are right, water hemlock is another name for cowbane:

In Europe northern water hemlock (Cicuta virosa) is the commonly known species; it is a tall perennial herb. Also known as cowbane and grows to about 2.5 metres tall. It has divided leaves and clusters of white flowers.

Just don't eat it OP!

I did contact a weed company to come and remove it and he said it wasn’t blotchy purple so wasn’t hemlock 🤷🏻‍♀️

What did the weed company say it was ??

Wild carrot.

He thinks milk parsley but wasn’t sure on that as so many similar apparently. I have a young kid and her friends play in the garden so trying to ID

Sorry he said cow parsley but I looked and seemed to see milk parsley

I initially thought cow parsley, but looking again I'd say hemlock. I'm no expert but I need to make sure the plants around are safe for my donkeys (although they aren't daft), so I'm constantly taking pictures and putting them through Google lens to get an idea of what things might be. We have a lot of cow parsley around us

Cow parsley looks to have more flat petals/flowers than bulbous ones like on that photo.

As I say, I'm no expert and have just started researching plants because of the donkeys.

Fwiw, cow parsley is fine for them, hemlock not.