You can check out the Declassified MOD film on the Lyme Bay Trials here (a clip of this appears in the show audio) : https://www.youtube.com/watch?v=OTwQJ1ASyws&t=302s)
You can also check out various documentaries and excerpts of press coverage of the Zinc Cadmium and Lyme Bay Trials produced when these issues first hit the headlines over at https://www.youtube.com/user/experimentsrus/featured)
INDEPENDENT REVIEW OF THE POSSIBLE HEALTH HAZARDS OF THE LARGE-SCALE RELEASE OF BACTERIA DURING THE DORSET DEFENCE TRIALS Professor Brian G. Spratt FRS, Wellcome Trust Centre for the Epidemiology of Infectious Disease, University of Oxford.
https://zeltus.eu/mre/downloads/dorset_bacteria_trials.pdf)
Zinc Cadmium Sulphide Dispersion Trials Report by the Academy of Medical Sciences to the Chief Scientific Adviser, Ministry of Defence on the Zinc Cadmium Sulphide dispersion trials undertaken in the United Kingdom between 1953 and 1964. December 1999
https://acmedsci.ac.uk/file-download/34958-ZincCadm.pdf)
For a recent historical appraisal of these issues, other open-air trials in the UK- as well as public and technical/ expert discourse on these matters see also:
Ulf Schmidt ( 2015) Secret Science, Chapter 7.