FGMs are the only ground cover over the winter in that spot.They look good over a long period, with judicious weeding out. So, they stay. The spurge is in the wrong place and the bed is used by children, I may pot it up and give it away.
Looks like a native caper spurge, Euphorbia lathyris. They're biennial. I weeed most of mine out but always leave a few to grow in my garden every year because I like the way they look.
Euphorbia lathyris has a clear, white central vein and a different growth pattern to the leaves, I would say. It looks "spiker". But mine may be just a young specimen.
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In the sticks near Peterborough
When you don't even know who's in the team
S.Yorkshire/Derbyshire border