The owner of a car thing is plausible. About the council saying it wasn't them though... I have a mate who was getting an extension to the back / side of his house and a week before the work was due to start the neighbours had a load of scaffolding put up, which was a problem for his builders. He asked his neighbours and they said it was put there and arranged by the council because their house (the neighbours) was council owned and needed repointing. Problem was when he phoned the council to find out how long it would be there they said they had no record of the job. The point of this story is although the council arranged a job, they couldn't confirm it because at the time of contacting them this information was lost in the system. So even if the council deny it, it may possibly still be them, although looking at the photos probably not as they would surely not just left all the branches on the roadside.