I was taking pictures from our hotel room moments after arriving in wembley park hotel, we were 9th floor with amazing views. i began taking photos of the stadium and then my daughter sitting on the window ledge looking out dreaming. i remember seeing 2 white lines moving in background, assuming they were planes. once we arrived home i began looking at my pictures and decided to see if the lines were planes, i then looked at all window shots and could see one picture looked clear but disk shaped. would like to know was it unexplained or something else.