A detailed index into information relating to mining activity and hazards contained within select field notebooks held by the British Geological Survey (BGS). Two former National Coal Board (NCB) surveyors created the index in the 1970s by examining the historical archive of geological field notebooks held by BGS (at the time IGS; Institute of Geological Sciences) at their London and Leeds offices, and extracting detailed information relating to mining activity. The data cover England and Wales only, and notebooks deposited or produced after 1975 would not have been included in the index. Only notebooks containing information relating to mining activity (and associated hazards) are included in the index, so the data are mostly constrained to traditional coalfield areas, though all mining information included in the notebooks considered is included. Later data (after 1960) recorded on field record cards or directly onto field slips are not included. The indices are paper records, with one document per notebook. The documents are tables containing page numbers, an extract of detailed information from the notebook, and a reference to a geological map sheet, where applicable. The indices have been scanned and are held as multi-page TIF files. The spatial data (British National Grid 5 km or 10 km grid squares) and geologist name, notebook number and page number have been digitised and are held in the BGS corporate database system. This information can be used to identify the original notebook by reference to the BGS field notebook index. The index is an important dataset to be considered under the Mines (Precautions Against Inrushes) Regulations 1979 (PAIR).