Daily ozone measurements from satellite sensor data (Total Ozone Mapping Spectrometer TOMS) over Dundee, Scotland (56.5 N, 3 W) during 1986-1992 with daily broad-band measurements of solar ultraviolet (UV) radiation reaching the ground deduced from ground-based instrumentation were used to investigate their correlation. The erythemally active UV radiation showed an increase of 35% during 1986-1992 while the total ozone amount showed a decrease of 10% during the same period. Furthermore, the ratio of the increase of UV radiation to the decrease in ozone concentration was maximum in July, showing that a small percentage decrease in total ozone during summer leads to a large percentage increase in solar UV radiation reaching the ground.