Long yellow UFO spotted over Dover in night

On May 2, 2017, a witness was watching stars in the sky nearby Dover (UK) when he has taken a picture of a weird light. On image, we can see a very long and yellow UFO. It wasn't visible to the naked eye.

Witness statement:

I reached dover cliffs at around 00:00 so i just sat on a grass and was admirig stars in the sky, at around 00:10 i decided to try take a picture of stars, by accident i took 22 pictures and decided to go through them, on a last 22nd picture i noticed a glowing line changing its position slighly, it was very strange as i didint notice that in the sky, so im just wondering maybe someone else has occured with this phenomenal view.