BBC: A device thought to be the largest tidal energy turbine to be built in the world has been described by its developer as “simple and robust”. Atlantis Resources unveiled its AK-1000 at Invergordon ahead of it being towed on a barge to a European Marine Energy Centre test site off Eday, Orkney. Chief executive Tim Cornelius said it was designed to survive in a harsh marine environment. The device has two sets of blades to harness ebb and flood tides. Mr Cornelius …