Prehistoric field system and cairn, early and later medieval religious complex, post-medieval lookout and quarantine station on St Helen's

The National Heritage List for England records Prehistoric field system and cairn, early and later medieval religious complex, post-medieval lookout and quarantine station on St Helen's as a scheduled monument. The saved point comes from the centre supplied by the official record. Listing does not by itself mean that the public may enter the place.

Prehistoric cairn and field system, with later medieval religious structures; the site reflects long-term human activity from the Neolithic or Bronze Age through the medieval period. Its significance lies in demonstrating successive land use and spiritual practices on St Helen's.