This story broke as I arrived at the Now That's Weird Conference on Friday (report shortly to be posted on main site. See Nick Pope's lecture). The incident occurred three weeks ago at RAF St. Athan, South Glamorgan. The helicopter was coming into land when a mysterious object flew past them narrowly avoiding collision. Initial reports, like the one linked, claim that the police gave chase persuing the craft right across the Severn Sea (or the "Bristol Channel" as the English call it) to the coast of North Devon. Later reports say that this did not happen and that the helicopter, with three crew aboard, continued to land as normal.