It is quite a challenge to get photographs of scenery underwater around Britain. Visibility most of the time is quite restricted and it is rather like taking photographs in the thickest fog you can imagine on land. Added to that, light levels are usually very low and a flash is often needed. Very wide angle lenses are usually employed so that the camera can be positioned close to the subject area, thus minimising the amount of "foggy"water between lens and the subject. By picking days when underwater visibility is at its best, it is possible to achieve some acceptable results.