I've explored this idea before and wrote about it previously for a resource for Norfolk County Council for a resource based on the striped cliffs of Hunstanton. 

The idea is that the general public can help to monitor rates of erosion by taking a photo when they visit particular locations. So that the images are comparable, a mount is provided: a slot into which a phone can be placed so that the images can be collected over time to show any changes - small or large scale.

The name of the project is CoastSnap.

This project in the SW is an interesting one. The images have been collected for some time, and are referred to in the BBC article above.

Where to find a CoastSnap Station in the SW to take part in the project and be a citizen scientist. The image above isn't in the SW of course.
  • Perranporth, Cornwall
  • Porthmeor, St Ives, Cornwall
  • Westward Ho!, North Devon
  • Dawlish Warren, South Devon
  • Wembury, South Devon
  • East Beach, West Bay, Dorset
  • West Beach, West Bay, Dorset
Image copyright: Alan Parkinson, shared under CC license