It's Euphorbia lathyris ... often self seeds about and pops up unexpectedly in disturbed soil. It can make a handsome plant if left to establish but some folk aren't keen. I like it.
If you remove it beware of the white sap which can cause wheals and burns on bare skin, particularly in bright sunlight so wear gloves and keep the sap away from your eyes.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
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It's Euphorbia lathyris ... often self seeds about and pops up unexpectedly in disturbed soil. It can make a handsome plant if left to establish but some folk aren't keen. I like it.
If you remove it beware of the white sap which can cause wheals and burns on bare skin, particularly in bright sunlight so wear gloves and keep the sap away from your eyes.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
I live in west central Scotland - not where that photo is...