1000 year old landmark from the Norman invasion of Britain after 1066. The hill is the remains of a Motte and Bailey castle. The land mark is now very much overgrown but there are previous photographs on the internet that show a different appearance in the landscape. There has been excavations on the site suggesting it could be older, as it could have been a Barrow Mound (Bronze Age).
From my research it appears that the bailey part of the castle was lost due to it being excavated to make way for the M6 motorway.