The above still image from a video was the one chosen by some media outlets a few years ago (2014) to illustrate the story "VIDEO: Birdwatcher spots UFO in skies above Burwell- and has the footage to prove it!." And why not, it looks like a weird diamond shaped craft, almost a flying saucer.
This old story wasn't on my radar until I made a comment on Twitter, wondering why (with their binoculars and long-lens cameras) birdwatchers didn't see UFOs (implying the the question of why there are no god photos of UFOs). Of course people then Googled "birdwatcher UFO" and that's about the only story that pops up, so it was gleefully offered as a counter-example by at least four different people.
The problem is, it's not a UFO. It's not even a diamond shaped object. It's bokeh. It's just an out-of-focus plane. A C-130.
Here's the original video.
First of all we can see it's bokeh (an out-of-focus light, taking on the shape of the camera's aperture) because we see other lights take on the same shape.
But then he focuses, and we see it's not a diamond at all, but six lights (and one flashing one), looking very like a plane.
What type of plane? That configuration of landing lights is very specific. It's a C-130
Here's video demonstrating this light configuration:
And here's where it probably was, inbound to Mildenhall, just a few miles away.
Here's a C-130, landing at Mildenhall, with the same light configuration.
So it's not a UFO. It's an IFO. The Cambs Times story was just clickbait, and the plane was identified by its distinctive landing lights in the video comments years ago. Hardly worth addressing - but the use of the diamond-shaped image gives a very misleading impression as to what was actually seen. And I think if four different people send me the same image in one day (and I anticipate more today), then it's worth addressing, just to clear things up.