Watching the workers

Something is going on in the field next to our house.  The field belongs to a charity, and is used (at a yearly subscription) as a dog walking field.  They appear to be cutting back the hedge (which separates the field from the road) and seem to be going to put in a fence - is this to keep people out, or to keep dogs in?

More worryingly, judging by the way the posts are laid out (one or two of which have been hammered into the ground since this photo was taken), the proposed new fence seems not to go all the way into the left hand corner (as you look at this photo), but curves round and hits the boundary between our garden and the field just in front of our kitchen window, thus leaving a small corner, containing a number of trees, fenced off from the field, and hedged off from the road, so relatively inaccessible.  One of those trees is the one we had to prune extensively earlier this autumn as some of the branches were hanging over our flat roof.

They finished cutting back the hedge, piled some of the clippings into the trailer behind the tractor, and departed around lunch time.  There remains a pile of clippings near the far entrance.  They didn't come back, so we had no opportunity to ask them what the exact intentions were.