I took part in OPAL's Soil and Earthworm Survey. My EPQ must be the only one that involves digging a hole in the ground and counting worms (I only found one, and it was an immature worm). You also record various aspects of the soil. There is a results map, which is a nationwide record of results which the public has uploaded. When the uploading form is ready to use, my results will be joining the thousands that have already been uploaded.