I hate the things and would get rid if I could, but alas it's not ours. It's at the bottom of our garden behind a fence, but belongs to the people across the way. It's not been cut for a few years and is now getting rather high. We have tidied what we can on our side (the bits overhanging our garden), but we can't do any more. How can we get them to do it? Should we send a polite note? We've never actually met them.