Based on catalogue reference ES 26 in the National Archives, mainly ES 26/2 and 26/4. “Atomic Weapons Research Establishment and Atomic Weapons Establishment: Peaceful Uses of Nuclear Explosions: Files and Reports”. Contains public sector information licensed under the Open Government Licence v3.0: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
The Open Government License does not cover personally identifying information, so names and signatures on documents have been blurred.
Operation Plowshare footage from the Prelinger Archives: https://archive.org/details/Plowshar1961 and https://archive.org/details/Plowshar1961_2
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