[en] The published information on environmental measurements and on discharges to sea and atmosphere from the Sellafield site has been used to enable estimates to be made of present and past radiation doses to members of the public in West Cumbria. Most of the available data relates to the groups of individuals in the population who are most highly exposed by virtue of their habits or their locations (the critical groups) and whose exposure has therefore been closely monitored. The doses to these groups have been estimated, but, in addition, consideration has been given to the exposure of average members of the public living in west Cumbria. Exposures as a result of external irradiation, and due to intakes of radionuclides by inhalation and ingestion have been evaluated. As a means of providing perspective, doses are compared with those arising naturally due to background radiation. (author)