Drones fly up to 6kg of packages and letters from Orkney’s mainland to the smaller islands of Graemsay and Hoy. Where a Royal Mail worker collects them for house delivery. Drones could make the islands’ mail service much more reliable. The islands are separated by a few kilometres of ocean. Usually, mail shipments are made by boat. But poor conditions can interrupt the service, so Britain’s postal service has launched a 3-month drone trial.