This photo captures two stunning sights: the remnants of the double rainbow; and the historic 1897 fishing vessel, Ethel Alice. Photographer Shaun Mills, who captured the shot shortly after a storm had passed, says that the double rainbow had been even more striking moments earlier.

Rainbows form because droplets of water in the atmosphere reflect and scatter the different wavelengths of light at different angles, meaning different colours appear in different regions of the sky to an onlooker. The second, fainter rainbow of a double rainbow is caused by two reflections within each droplet. But a rainbow has to be particularly intense for this second bow to be visible – as it is here.

Photo location: Mersea Island, Essex, United Kingdom 

Photographer based: Mersea Island, Essex, United Kingdom 

Camera: Canon R5 & RF 16mm lens