Thank you for this information, it sounds as though you are telling me that there is no case law. The earlier complaint from our neighbour also included a threat to apply for an anti social behavior order and this resulted in a visit by our councilor at that time. She brokered an agreement that we have kept for the intervening 8 years. Is he likely to be successful if he proceeds with an action against us? If he does carry on and is unsuccessful again would we be in a position to claim harassment?