A rare photograph of the National Gas Turbine Establishment (NGTE) Canberra aircraft, WH657, on loan to the Microbiological Research Establishment (MRE) Porton Down. The NGTE collaborated with MRE Porton Down with the development of a Biological Warfare aircraft spray rake. This photograph shows one of the proposed spray-rakes disseminating a Biological Warfare simulant over Salisbury Plain.

A rare photograph of the National Gas Turbine Establishment (NGTE) Canberra aircraft, WH657, on loan to the Microbiological Research Establishment (MRE) Porton Down. The NGTE collaborated with MRE Porton Down with the development of a Biological Warfare aircraft spray rake. This photograph shows one of the proposed spray-rakes disseminating a Biological Warfare simulant over Salisbury Plain.