Suspicious Sphere Stumps South Wales Officers

A bizarre object, invisible to the naked eye, was captured flying over the Bristol Channel by a police helicopter's thermal imaging camera the night of Saturday, September 24th.  The mysterious sphere was declared by the South Wales officers to have been going against the wind at approximately 1000 ft, a fact that would rule out a balloon or Chinese lantern.  

The police themselves were at a loss to explain the UFO, which was not detected by local air traffic control, asking through a tweet, "Any suggestion???  Nothing seen by local ATC."  

Adding to the mystery, this is just the most recent UFO sighting in the area.  41 year-old Fiona Powell was walking with her children and friends along Severn Beach's seafront when she stopped to snap a photo of the view.  Unbeknownst to her, though, the photograph contained more than just a pretty view of the ocean.

What do you think?  Could Britain's Bristol Channel be headed towards a UFO flap, or is this just a comical cosmic coincidence?

Yours in Impossibility,

Tobias