The tapes were previously used for a best-selling book in 1992, but have been released to a production company in their entirety for the first time to produce a documentary The tapes, previously used to write a bestselling book, are set to form the basis of a documentary on Diana's life coming next year Key points and original sources are listed below.

• The tapes were previously used for a best-selling book in 1992, but have been released to a production company in their entirety for the first time to produce a documentaryS1

• The tapes, previously used to write a bestselling book, are set to form the basis of a documentary on Diana's life coming next yearS2