It's definitely a Euphorbia but looks more like amygdaloides than sikkimensis.
Quote www.for Euphorbia sikkimensis...see link below. "An sub-shrub with a dome shamed habit, masses of narrow, bright green leaves with a pale central stripe, a more choice and subtle variety compared to E. melifera, a very useful addition in the garden. Large yellow flower heads are produced in spring."
Anyone know what plant this is please? I have a nice friend who supplies new plants after taking cuttings but forgets to label them.
Posts
"An sub-shrub with a dome shamed habit, masses of narrow, bright green leaves with a pale central stripe, a more choice and subtle variety compared to E. melifera, a very useful addition in the garden. Large yellow flower heads are produced in spring."
https://www.championplants.co.uk/products/euphorbia-sikkimensis-agm#:~:text=An sub-shrub with a,heads are produced in spring.
https://www.google.com/search?q=Euphorbia+sikkimensis.flower&tbm=isch&ved=2ahUKEwj-5N6hg8z6AhUOhxoKHUTrDaMQ2-cCegQIABAA&oq=Euphorbia+sikkimensis.flower&gs_lcp=CgNpbWcQDFAAWIsCYJEWaABwAHgAgAH4AYgB6ASSAQUwLjEuMpgBAKABAaoBC2d3cy13aXotaW1nwAEB&sclient=img&ei=hQI_Y76OF46OasTWt5gK&bih=577&biw=1280&rlz=1C1CHBF_enGB785GB785#imgrc=MX53EtX970593M
This is E.sikkimensis, which I don't think is the plant in your photo.
When you don't even know who's in the team
S.Yorkshire/Derbyshire border