BACKGROUND Lung cancer screening with low-dose CT has been shown to decrease mortality. Low lung cancer survival rates in the UK, driven primarily by late-stage presentation, provide the impetus for implementing screening. Nascent guidance on screening in the UK recommends primary care case-finding. However, the potential impact and acceptability on primary care, and the opportunistic utilisation of other case-finding routes such as pharmacies, smoking cessation services and respiratory clinics, have not been fully explored. OBJECTIVE To explore healthcare professionals' views and perspectives about lung cancer screening and their preparedness and willingness to be involved in its implementation. METHODS A qualitative study was carried out with semi-structured interviews conducted with GPs, pharmacists and staff from smoking cessation services within Southwark and Lambeth and from respiratory clinics in Guy's and St. Thomas' NHS Trust in London in 2018. Sixteen participants were interviewed, and the interview transcripts were analysed thematically. RESULTS Participants described lung cancer screening as an important diagnostic tool for capturing lung cancer at an earlier stage and in increasing survivorship. However, the majority expressed a lack of awareness and understanding, uncertainty and concerns about the validity of screening, its misuse and the potential impact on their patients and workload. CONCLUSIONS Study participants had mixed opinions about lung cancer screening and expressed their concerns about its implementation. Addressing these concerns by providing resources and effective and detailed guidelines for their use may lead to greater engagement and willingness to be involved in lung cancer screening.