The National Archives has 3 audiobooks on Listento.it, narrated by 9 narrators. The most-rated is In Their Own Words.

For centuries, ships' commanders kept journals that recorded their missions. These included voyages of discovery to unknown lands, engagements in war and sea and general trade. Many of their logs, diaries and letters were lodged at The National Archives and give a vivid picture of the situations that they encountered. Entries range from Captain James Cook's notes of his discovery of the South Pacific and Australia, to logs of the great naval battles, such as Waterloo and Trafalgar. From the ships that attempted to stop piracy in the Caribbean, to the surgeons who recorded the health of the men they tended and naturalists who noted the exotic plants and animals they encountered, comes a fascinating picture of life at sea.
©2017 The National Archives (P)2017 Audible, Ltd

Letters, postcards, notes and telegraphs from the great and the good, the notorious and the downright wicked, shine a spotlight on a range of historical events and movements providing an immediate link to the immediate and much more distant past. This audiobook includes letters from: Sir Arthur Conan Doyle, Mikhail Gorbachev, Lucien Freud, Barbara Hepworth, Nelson Mandela, Caitlin Thomas, Mary Whitehouse, Gandhi, George Washington among many others. Subjects covered include suffragette disturbances, obscene publications, relations between international leaders, child emigration including the Kindertransport. The audiobook features 55 letters, each with a 600-word essay, and a 3000 word introduction.
©2018 The National Archives (P)2018 Audible, Ltd

The way we communicate has changed. Today many of our interactions are digital, but until recently writing letters was the norm. Drawing from over 100 miles of records held at the UK's official government archive, The National Archives at Kew, this collection of letters, postcards and telegrams will shine a spotlight on a range of significant historical moments and occurrences, recapturing a lost world in which correspondence was king. The audiobook includes letters from Karl Marx, requesting UK citizenship; an anonymous writer purporting to be Jack the Ripper; Josef Kramer, the commandant of Bergen Belsen; Winston Churchill to President Roosevelt, requesting US support against Hitler; Clement Atlee to Harry S Truman following Hiroshima; the spies Burgess and Maclean; as well as the 'real Charlotte Gray' spy, Christine Granville, amongst others. Topics covered include the Monteagle letter that warned about the Gunpowder plot, letters from the Wright brothers trying to get the War Office to fund their aeronautical research, a dispatch on the murder of Archduke Franz Ferdinand, Christine Keeler's Russian-British love triangle that begat the Profumo affair, US disapproval of British trade with Cuba, a letter reporting on the first day of the trial of Nelson Mandela, and the anonymous letter that framed the Krays. The audiobook features approximately 80 letters, each with a 600-word essay, and a 3,000-word introduction.
©2016 The National Archives (P)2016 Audible, Ltd