Unauthorised Encampments: The most effective way to prevent encampments is to secure all potential vehicle access points, such as gates, gaps in hedgerows, and wide verges as best as you possibly can.

Earth Bunding and Mounding: Create large, steep mounds of earth or rubble (1-1.5m high) around the perimeter. This is a highly effective, natural-looking deterrent.

Ditching: A deep ditch can prevent vehicle access, though it should be designed with drainage in mind.

Heavy Obstacles: Use boulders, large tree trunks, or concrete-filled tire stacks to block gaps. Ensure these are too heavy to be moved by a 4x4 or towing equipment.

Robust Fencing and Gates: Install strong steel palisade fencing or 1.8m+ fencing. For gates, use high-quality, hardened steel padlocks and "box them in" to prevent the use of bolt cutters or angle grinders.

Height Barriers: Install secure height barriers (e.g., 1.8m - 2m) at access points to prevent caravans and trailers from entering. 

Clear Signage: Display clearly visible, legal "Private Property" or "No Unauthorised Access" signs. These prevent any claim of accidental trespass.

Lighting: Install motion-detector lights to increase visibility at night, which acts as a deterrent.

Security Cameras: CCTV or trail cameras (monitored) can deter trespassers and provide evidence of damage or illegal entry.

Active Maintenance: A well-maintained site looks occupied, while overgrown or neglected land is a target. Regularly cut grass and clear rubbish. 

Regular Inspections: Visit the land frequently, especially if it is remote or empty. Early detection of potential access breach is key.

Build Relationships: Inform local police, community safety teams, or nearby neighbour's about your land and ask them to report suspicious activity.

Record Keeping: Keep a log of your security measures and any incidents of Unauthorised Encampments.