I'm probably being really stupid.
On the attached plan of our house, it shows a hedge. Elsewhere on the boundary line there are the little Ts to denote ownership of the boundary, which are fences. But there is no T on the hedge itself, even though there is a bold line to show the hedge is inside the boundary.
Do we own the hedge or not? I say we don't, because the hedge was there before the house was built. DH says we own it as it's within the line and the hedge would have been planted when the planning permission was given (years and years ago).
No one currently lives in the house the other side of the hedge so we can't have a conversation.
Hope that makes sense. Also hope the picture shows up. 