There is a cut bench mark on the north end of this east parapet. See http://www.geograph.org.uk/photo/5187611 for a closer view and http://www.bench-marks.org.uk/bm80191 for details.
Uploaded to Geograph by Brian Westlake on 3 November 2016
Photo © Brian Westlake, 3 November 2016. Licensed for reuse under this Creative Commons licence