From fire to dust: Plutonium particles from British nuclear testing in outback Australia more complex than previously thought

More than 100 kg of highly toxic uranium (U) and plutonium (Pu) was dispersed in the form of tiny 'hot' radioactive particles after the British detonated nine atomic bombs in remote areas of South Australia, including Maralinga.

source https://www.sciencedaily.com/releases/2021/05/210521081957.htm