NHER 11890 (Monument) - Cropmarks of a ring ditch of an unknown date

Ring ditch on RAF air photographs.
Information from A. Lawson (NAU).

No sign in young cereal.
A. Lawson (NAU), March 1976.

February 2010. Geophysical Survey.
Magnetometer survey of proposed Dudgeon Offshore Wind Farm onshore electrical connection sub-station site.
The ring ditch was not detected during this survey but it is possible that geological conditions may have masked any magnetic anomalies of archaeological origin or deep ploughing might have significantly degraded the site.
See report (S1) and NHER 60615 for further details.
S. Howard (HES), 24 June 2011.

October 2023. Wendling Beck and Fransham Aerial Investigation and Mapping (AIM) Project.
The cropmarks of a ring ditch (see above) of an unknown date are seen on aerial photographs (S2-S4). The feature appears to show as a cropmark bank rather than as a ditch on S2-S4. On the sources consulted by the project, the feature was only visible on aerial photographs from 1946 (S2-S4). The ring ditch was also not recorded during a previous geophysical survey ahead of the proposed Dudgeon Offshore Wind Farm onshore electrical connection sub-station site (see above). It is therefore possible that the feature could be natural in origin, a product of modern agriculture or possibly relating to a former embanked post medieval extractive pit. However, an archaeological origin for the feature cannot be ruled out. The monument polygon has been updated to the location of the feature as seen on S2-S3.
J. Powell (Norfolk Historic Environment Service), 04 October 2023