A colour photograph of a man and two other people visiting Steep Holm, with the Bristol Channel visible behind them and the grounds of the nature reserve in the foreground. The people are stood around a large mounted anti-aircraft gun, which is fitted with a sign which reads 'BOFORS 40mm LIGHT ANTI-AIRCRAFT GUN [--] OF THESE WERE DEPLOYED ON STEEPHOLM DURING THE SECOND WORLD WAR' and 'DANGER PLEASE KEEP OFF'.