The Summary of Progress, the Survey's annual report, was issued in several parts each year, one part a formal annual report the other being a journal holding scientific papers. In the early years the papers were held in the appendix and from 1927-1936 they were issued as Part ii or Part iii of the Summary of Progress. To give greater visibility to the part holding the articles E.B. Bailey changed the title to the Bulletin of the Geological Survey of Great Britain. Nos. 1 and 2 appeared in 1939, just before the series was interrupted due to the Second World War. The Bulletin series ran to volume 69 (1978) though one more issue came out as a special issue on the 'Mesozoic and Tertiary volcanism in the North Atlantic and neighbouring regions : Proceedings of the Flett Symposium, November 1976'.