PurposeThis preliminary investigation aims to examine the psychological impact of the COVID-19 pandemic on patients and staff within a high secure service.Design/methodology/approachTo discern the connection between COVID-19-related distress and multiple factors, the study involved 31 patients and 34 staff who completed assessments evaluating coping strategies, resilience, emotional reactivity, ward atmosphere and work-related aspects.FindingsResults demonstrated that around a third of staff (31.2%) experienced COVID-19-related distress levels that met the clinical cut-off for possible post-traumatic stress disorder. Emotional reactivity, staff shortages, secondary traumatic stress and coping strategies were all positively correlated with COVID-19-related-distress. Resilience was negatively associated with distress, thus acting as a potential mitigating factor. In comparison, the prevalence of distress among patients was low (3.2%).Practical implicationsThe authors postulate that increased staff burdens during the pandemic may have led to long-term distress, while their efforts to maintain minimal service disruption potentially shielded patients from psychological impacts, possibly lead to staff “problem-focused coping burnout”. This highlights the need for in-depth research on the enduring impacts of pandemics, focusing on mechanisms that intensify or alleviate distress. Future studies should focus on identifying effective coping strategies for crisis situations, such as staff shortages, and strategies for post-crisis staff support.Originality/valueThe authors postulate that the added burdens on staff during the pandemic might have contributed to their distress. Nonetheless, staff might have inadvertently safeguarded patients from the pandemic’s psychological ramifications by providing a “service of little disruption”, potentially leading to “problem-focused coping burnout”. These findings underscore the imperative for further research capturing the enduring impacts of pandemics, particularly scrutinising factors that illuminate the mechanisms through which distress is either intensified or alleviated across different groups. An avenue worth exploring is identifying effective coping styles for pandemics.