Thanks for posting those pictures as I was wondering myself what it was? I’ve been pulling them up thinking it was a weed but would be keen to hear what it is.

I'm not an expert on British garden weeds but I would say that it is Rosebay Willowherb. I have them in my flower beds and I pull them before they become established.

Not Rosebay but it is a willowherb and should be removed.

I get this by the bucket full it is a willowherb. possibly pale willowherb Epilobium roseum. it has pale pink flowers and has floating seeds that spread everywhere.

Bane of my life! But luckily, easy enough to remove with a trowel.

Thanks for that everyone.

I think it is a willowherb "Chamerion angustifolium". I just ease a hand fork under the foliage and it comes up very easily.

Yes, prolific but easy to remove, unlike bindweed, which is the bane of MY life!

Chamerion angustifolium [rosebay willow herb also called fireweed] produces a fleshy root/rhizome so when you lift it if it does have these fleshy [2-5mm thick] 'roots' make sure you take them out.

Pennyfarthing...I'm so relieved that I don't have bindweed to contend with. Nettles, Horsetails (in imported topsoil which I paid good money for...grrrrr), Ground Elder ..these are the most persistent fiends here.

Oooh! I don't like the sound of horsetail and ground elder! I do have the odd bit of horsetail coming up through the slabs at the side of the house where I store pots and useful looking bits of wood and I am trying to stamp it out, but I know it has probing, long reaching roots. A bit like bindweed really!