An article by an academic historian that demolishes the original claims made and it ends with:
So is this part of a government cover-up? In short, no. There will always be limitations on government archives and files will unfortunately be lost. Has this changed the broader trends of British history? The answer has to be no again. As always, historians are encouraged to consult as many sources as possible. Even if the government was trying to stealthily manipulate history, past evidence shows they will not be successful.
Link:http://www.historyandpolicy.org/opin...ritish-history