British nuclear archive files withdrawn without explanation

Which of course is what every state actor will have done as soon as it was released. Which points to this being a reorganisation or representation rather than an edit. If it were an edit then the rational way to do it is silently with a document collection update designed to hide the changes from detection via metadata. So, you accept that the other state actors out there have what you leaked in error, but you hope that they haven't noticed, and you remove the possibility that someone will alert them to the information independently.