In 1957 as part of the UK’s biological weapons program called the ‘Large Area Coverage Trials’, 300 pounds of Zinc cadmium sulfide was sprayed over a 300-mile line over the Irish Sea with samples taken at meteorological stations in England and Wales.
The trials used aircraft to spray these fluorescent tracer particles to simulate a biological agent cloud attack. Even then it was known that this chemical mix was known to cause cancer.
According to a the official report on the trials by the Offensive Evaluation Committee in Porton Down, “if the samplers gave a true picture,” then 28 million people would have received a dose of the biological weapon.
*Photograph taken from the Holyhead-Dublin Port ferry, at the approximate geographical centre of the Irish Sea, looking east.