(Amended) Not a hellebore but what Euphorbia is it?

(Amended) Not a hellebore but what Euphorbia is it?

Observation - (Amended) Not a hellebore but what Euphorbia is it? - UK and Ireland. Description: growing outside a garden fence on a narrow strip of municipally maintained border alongside a pavement.

growing outside a garden fence on a narrow strip of municipally maintained border alongside a pavement.