Thank you for the information Simon, is it based on recognition of the mound shown in the photographs?
In which case, the OS grid ref needs to be altered from SP829053 to SP82210398.
TMA Ed
Yes, the photographs definitely show the neolithic barrow. The orange plastic fencing shown around it on the chequers knap page was put up during the Oxford Archaeology excavation in late 2006/early 2007.