Your comment prompted me to do a bunch of searching. When I was a kid, one of my friends' dad was a pipe smoker. I was admiring his pipe collection, and asked what the beautiful wood was. He said "briar." The only briar I knew of was from the old story about "Brer Rabbit and the Briar Patch." I ask him what a briar was, and he said it was a kind of rose. As I grew up, the kinds of briars I encountered were mostly red and black raspberries, which are related to roses, and whose canes are much like the branches of rose bushes.Looks like Briar, but hard to say positively
I also doubt that it is hawthorn or blackthorn.Definitely not Gorse (at least in my opinion) but the pictures of Jersey Cabbage make me re-think my suggestion of either Hawthorn or Blackthorn.