Are these rosehips? Is there something I can do with them?

[Ginazon]

Hanging over our fence from our neighbours garden. I don't know if that means I'm not supposed to take them...

They look like rosehip to me. Rosehip tea is lovely but I would wait fir Simon more knowledgeable to come along before going for it

Make itchy stuff.
Like itching powder, but not powder.

My dm used to make rosehip cordial which you could dilute with water.
I don’t know the recipe though.

www.greatbritishchefs.com/recipes/rosehip-syrup-recipe

Here

You can make rosehip jelly, not sure it’s worth the effort. Alternatively give them to any parrots you know. They love them and they are full of vitamin C.