MoD Aerial Spraying Norwich

The Penetration of built-up areas by Aerosols at night - Porton Down Public Area Biological Warfare Experiments on Norwich

This was a Ministry of defence test carried out on the city of Norwich on January 13th, February 10th, March 16th and April 14th 1964.

These are PDF documents which claim to have been declassified in 2000 and describe an experiment by the ministry of defence where the city of Norwich was sprayed by aircraft with a substance known as "Silicon treated FP", which is claimed to be "innocuous in the concentration which were expected to occur on the ground".

These documents outline the nature of the experiment and the involvement of the local police in it.

During May 1963, the War Office Chief Scientist sent a memo to the Secretary of State explaining the type of public area experiments that were being conducted in the UK by Porton Down. As can be seen in the covering letter, the experiments were conducted in a high level of secrecy because "knowledge of them by unauthorised persons could be politically embarrassing."