Wall or hedge?
Introduction
The photograph on this page of Wall or hedge? by Graham Horn as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk

Image: © Graham Horn Taken: 29 May 2011
This ancient wall has been embedded in an equally ancient hedgerow such that it is almost impossible to determine which is which. Let's just call it a boundary.