I agree

Yes. Looks like Chickweed to me too.

Wicked, thanks guys.

Chickweed puts out long stems punctuated by pairs of leaves and small star-shaped flowers... in its formative early stage, it looks a little like a small, euphorbia-like weed, which has more erect stems and leaves which grow in pairs but at right angles, one pair to the next. The stem also weeps a milky sap. When they're both very young, it's often very hard to tell the difference, so let them grow for a bit, then it will be easier to differentiate....

I'm pretty certain it's chickweed. And I'm also pretty certain it isn't Euphorbia peplus. There are several seedlings in the photos which have developed their true leaves and they are clearly recognisable.

That's good to know. Obviously, 'the real thing' is always better than a photo. In which case, it being chickweed, you have a delicious salad crop there... It grows in my flower border too...I love it. Sometimes, when I'm gardening, I'll even grab a sprig or two and eat it there and then!