The central theme of this 1990 Annual Report from British Nuclear Fuels Limited (BNFL) is that the health and safety of the public and protection of the environment are of primary concern. The report describes the fuel cycle for the production of radioactive materials used by the United Kingdom nuclear industry. Radiation protection measures undertaken by BNFL are explained as is their environmental research programme. Detailed attention is paid to the monitoring of effluent discharges into the environment and arrangements for radioactive waste disposal. The work of each BNFL site is described. The report finishes with a description of its occupational safety measures. (UK).