These trees look as if they should be a hedgebank, but the line stops in the middle of the field; a satellite view of the field does not have any clear sign that the line of these trees continued to the south (left), but the old 25K map shows a well at the southern end.
Uploaded to Geograph by David Smith on 9 May 2013
Photo © David Smith, 9 May 2013. Licensed for reuse under this Creative Commons licence