Wow, I try every time to guess the ID questions but so, so rarely get it right. But when I looked at the picture for the first time I thought that looks like a carrot gone to seed. So chuffed I'm at least in the same overgrown ballpark as the experts for once. Doesn't matter if it's right or not I just feel a tiny bit less stupid than normal.
“Success is the ability to go from one failure to another with no loss of enthusiasm.” Winston Churchill
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The plant behind it could be an Echinops, but I can't see it clearly enough to be certain.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Could the frilly leaved ones possibly be carrots in their second year?
In the sticks near Peterborough
Looks a bit like this https://www.crocus.co.uk/plants/_/selinum-wallichianum/classid.2000007833/?gclid=EAIaIQobChMIguSLmtDh2gIVRLHtCh0ZWAetEAAYASAAEgKFL_D_BwE
The photo of the whole plant looks very much like the OP's photo.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
https://www.sarahraven.com/flowers/seeds/annuals/ammi_visnaga.htm
Some of these appeared in my garden the other year ... no idea where from ... possibly from a bird feeder.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.