Barbed wire fencing is being erected across West Penwith (around Tregeseal and Nine Maidens/Lanyon areas in particular) with a view to introducing more cattle to areas where prehistoric sites stand.
See the following links:
stonepages.com/news/archives/003108.html
and for pictures (updated regularly):
menantolstudio.freeserve.co.uk/save%20penwith%20moors.htm
There is also a management plan leaflet:
theheathproject.org.uk//content_pdf/en/Managing_Archaeology_booklet1220874208.pdf
Which includes the following statement:
“Paths and tracks which pass over, or
close to, archaeological remains may
present a risk and may need to be
rerouted. Care is needed so that new
routes do not themselves affect sites or
features.”