They include a file about Kim Philby’s archive and another relating to the successful Olympics 2012 bid.
There is material relating to the tsunami in the Indian Ocean and birthday messages to Queen Elizabeth the Queen Mother and Princess Margaret.
Of the files, The National Archives has digitised more than 80 which are available to view on our catalogue Discovery. The rest of the documents are available to order and read at The National Archives in Kew, south-west London.