I'd pot that up Lena, and wait. I can't see white roots. They look like geranium roots to me. Something will happen this season then you'll know
Good idea Will, you can't mistake those
I should think they're weeds or plants that ought to be called weeds. Nothing desirable grows that quickly
Can you get in for a close-up photo?
Another possibility Deedle.
I think they're geraniums, the second one definitely
Not angelica. There are related plants that grow in water. wild celery is one and there's a poisonous one that I can't remember the name of.
I don't know any of them well enough to ID. Landgirl might know
Yes, that's alkanet, there are some comfreys with blue flowers but the leaves look wrong for those.
I don't know hollie, they're not ones I planted with insects in mind but I can't see why they wouldn't be. The polemoniums, except for the yellow brandegeei, don't do well for me. Soil too dry and too much mildew. Should be OK in Wales
the top is a polemonium, probably P. caeruleum, Jacobs ladder
the second a dicentra, maybe D. eximia or a hybrid
weed or not is up to you Steve