This report analyzes a sample of 246 British railroad incidents using data from the Rail Safety and Standards Board (RSSB) Safety Management Information System (SMIS) and Incident Factor Classification System (IFCS). Trends in fatigue-related incidents, the types of data available, and the calculation of Fatigue Index (FI) scores are discussed. Fatigue was identified as a factor in 21% of the examined incidents. A literature review of fatigue in the rail industry is also included. The report concludes with recommendations for improving data collection and data analysis related to fatigue.