43-year-old Matt Doughty from Hertfordshire couldn't believe his eyes when he watched the footage back. Doughty, along with his friend Kevin, had been sitting at home watching the football on TV when he received an alert on his phone from his doorbell camera to tell him that someone was outside. When he played back the footage he expected to see a person standing on his doorstep, but was surprised to discover that the camera had instead been triggered by something in the sky. The object, which consisted of three bright lights in a triangular formation, could be seen slowly moving...