Photo of a thing eastern England 2nd jan 25

Photo of a thing eastern England 2nd jan 25
Time: 2nd Jan 25, approx 7pm
Location: soham, east anglia, England 

Partners son took these photos ~7pm in east of England. Location is approximately 10 miles from mildenhall air base for what that’s worth… 
Hadn’t spotted the green thing and was taking a photo of the stars as a particularly clear night. Saw it in the photo and took the second image. 
Apparently didn’t move, no video or other photos. Images taken on his phone. 

Thought maybe lens flare from bright lights in the bottom left? Black part in 2nd image is weird though? 

Anyway, not saying it is anything interesting but sharing as it looks a little curious. I’m sure probably a prosaic explanation so if anyone has a suggestion let me know!