'Course they did/do. But apart from some very tightly drawn.... nay, resentful pencil lines round scheduled monuments neither the law nor the establishment concede the fact in most cases, leaving them open to damage and encroachment. But how do you measure the extent of a site - ritual use, aesthetics, other monuments, archaeology or viewshed? PhD on a postcard to EH please.

PS, don't think Bolton Parish church has a safe boundary. I can point you to a lady metal de-unmentionablist who has been doing her thing in a churchyard alongside the vicar. All perfectly legal, natch, this being Britain not the hillbilly quarter of Texas....