Looks like aquilegia to me, not a weed.

My brain is saying not Aquilegia, Louisa, but Thalictrum. Not sure that i have the right name, though, but I agree it is not a weed.

I've not heard of Thalictrum before, but having googled it yes it could be. At least we agree it's not a weed!:)

thank you Louisa and Bulbaholic ill leave it where it is for now and will post a picture if it flowers !

I'd go thalictrum too. both can be nice plants in the right position.

Both Thalictrum and Aquilegias are seed weeds in this garden. We have to very carefully dead head and even then we need to remove dozens of babies of both of these. Miss one seed head at your peril.