"Stewart Robert Hinsley" wrote in message It
looks like Chelidonium majus to me.
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Stewart Robert Hinsley

Once upon a time I wanted a big area of wild plants in my garden. I saw
this one that I didn't have and I took some seeds. Greater Celandine.
Worst thing I ever did. It's everywhere now, growing on my compost heap and
in every bit of soil it can get it's seeds into.
Bad mistake.