Cockenzie Power Station near Edinburgh, Scotland imaged by Andy Forrester (Photography) late afternoon on 14th June '08. ©Andy Forrester, shown with permission.       Strange sky colours are often mistaken for rainbows. These changing colours are a rainbow. The late afternoon sun was 35-39° high placing the rainbow tip near the horizon. At upper left a drifting rain shower produces a fragment of the red edged primary bow. In the main image there are no raindrops correctly positioned in the sky to light the primary itself but fragments of its supernumeraries glow with characteristic greens and purples.