"I am sending you a photo taken at the naval dockyard in Plymouth, England.
I used to live in the yard with my parents and sisters. My father was resident water bailiff from 1963 till we moved out in 1978.
This photo was taken last year when my sister and I revisited the yard on its opening day.
I cannot find any reason for the strange dark line. Also when the photo is enlarged there is a strange ufo shaped object in the sky near the dark shadow.
It was a very hot clear Sunday afternoon when this was taken."
