That’s really weird. Is that possibly an old link?
I have to say it does look like a smudge until you zoom in and see the reflection.
My link was the one from current Google Street View, and based on the date of this article, if it is a re run through that area, it must be very recent..
It seems more likely this is just a hoax, someone either gave The Sun a faked image or The Sun faked it themselves.