Celandine?

Yes, that's what I think it is, too. It grows in the woods here at this time of year as a wildflower. I like it.

its lesser celandine, a wild flower that has lots of small tubers. They are pretty BUT they can be invasive. I like them in small clumps in the more wildlife areas.
They are a pain to eradicate in a 'good' flower bed. The tubers are brittle and are easily left behind when you try to dig them up.

Keep this by itself as if it grows around other plants you will find it impossible to remove .You will find the novelty of this wears off pretty quickly!.

Yes, persistent little blighters! I just try to enjoy them and keep them in check, but eradication is another matter entirely.

Thanks guys you've hit the nail on the head there. Shame they are such thugs, they are quite pretty and one of the only things that seems to want to grow there. Not sure yet whether to try to get them out or just try to keep them in check, hmmm decisions decisions.

Thanks again :)

A warning, samjp, their seed heads will spread and spread and spread. They are totally lovely, if you can keep them contained, or are happy for them to run rampant through your border. If you decide not to allow them in your garden then you need to get them out now, before they flower and seed.

There's also one with dark leaves sold under the name 'Brazen Hussy'. Not all seedlings from it come true so even if you didn't start with the green-leaved version, you'll finish up with it sooner or later.

The seed heads explode when they mature which helps them to spread far and wide. My new shade bed is green over with them at the moment. They grow from little bunches of corms and if you dig them up and miss just a bit it grows again. Best to dig out all you can see. They are really lovely in the wild though. I'm reluctantly going to have to glyphosate mine. But they do disappear completely by the early summer.

Hmm from those words of warning digging them out sounds like a pretty excellent idea. Will have to snip the flowers off for the moment. Back to work tomorrow so not going to have chance to dig them out for a while. Thanks guys.