Any attempt to demonstrate that either crop circles or UFOs are associated with ley lines would face a fundamental problem - nowhere in England isn’t close to what someone at some point hasn’t suggested was a ley line. With sufficient ingenuity, you can ‘find’ them anywhere. And so people have.
As it happens, my house is very close to one of the best-known ley lines. We cannot be talking more than 100 feet or so. Moreover, its intersection with another well-known ley line is only a few minutes’ walk away. I’m however fairly sure that any strange lights in the sky are because this is also under the flight path for the nearest airport, but I’ll keep you posted if any unexplained patterns appear on my lawn.