I was always told by my old man that it was gorse. So I called it this for years. Last year, I posted a picture and a somewhat irritable commenter told me it was broom, not gorse. Not checking, I took their word for it.
Linda and others, you are quite right, that’s Gorse and I am now finally clued up.
Cheers to all who drew my attention to it. I do like to get stuff right, and if ever I’m wrong, feel free to point it out. I want to get stuff right.
Personally, I blame the Welsh.