26 September 2016
(Bristol Post, UK)
The invisible, unknown object was filmed (by thermal cameras) over the Bristol Channel, UK, on 24 September 2016, at around 9:30 p.m.
The police helicopter was flying at 1,000 feet.
The police ruled out that the object could have been a balloon or a Chinese lantern because of the heat and movement.
Satellite photo of Bristol, UK (tageo.com)