The collection consists of the business and personal papers of John Reith, first Baron Reith and first Director-General of the British Broadcasting Corporation (BBC). It is composed of:
- 18 volumes of personal diaries (1911–1971)
- 27 volumes of enclosures (scrapbooks) (1889–1969)
- 12 files of Reith's post-BBC correspondence (1940-1969)
- Papers on the Advertising Commission (1964-1971)
- Minutes of the Cycle Division Council (1956-1958)
- Unpublished biography of Thomas Chalmers (1957-1958)
The diaries have always been the main focus of interest in this collection. It should be noted that they concentrate as much on Reith's personal, and indeed domestic, affairs as they do on his public life, and they are in no sense a journal or record of the pre-war BBC. Nevertheless, they make for a lively, if tendentious, account of historic events and personalities.
Up to 1934, the original diaries are in typed form. This is the result of Reith's self-editing of his previously written material. Thereafter, they are in Reith's own, densely-written, hand. The Written Archives Centre's typed transcripts run up to 1954. Reith's pagination has been retained, as has his idiosyncratic way with layout.
The enclosure volumes, being in poor condition, were re-mounted by the Berkshire Record Office in 1980. They are in large folio form, and the original layout of the papers on the page has been replicated. They include letters, both business and personal, received by Reith, but generally not his side of the correspondence. There are also numerous photographs, press cuttings, and mementoes. Some items relating to the Reith children were returned to Christopher Reith at his request.
There are currently two indexes for the contents of the enclosure volumes. Letters written by public figures, which are included in enclosures volumes six to thirteen, have been listed as 'Letters of Special Interest' in a typed hard copy format. A second index, held in a digital format, covers all contents of the first six volumes.