This Record is a digital tombstone. The data files associated with this record were destroyed/deleted on the 17 April 2026 in line with the approved retention schedule. This research study investigated the impact of Scotland’s 2006 smoke-free legislation on bar workers’ health, exposure to second-hand smoke (SHS), and workplace experiences. The data collected included a longitudinal survey data from 371 bar workers across 72 bars, collected pre-ban, 2 months post-ban, and 1 year post-ban, capturing self-reported respiratory and sensory symptoms, attitudes toward the legislation, and workplace experiences. A sub-sample also included biomarker data (salivary cotinine) and personal PM2.5 measurements to objectively quantify SHS exposure. Additionally, 12 in-depth qualitative interviews provided insights into workers’ perceptions of social and environmental changes. The study found that exposure to SHS decreased substantially after legislation, with associated improvements in reported respiratory symptoms, while qualitative data highlighted enhanced workplace comfort and mixed social impacts.