The article reviews analogue case studies relevant to large-scale underground hydrogen storage (UHS), highlighting the technical challenges and safety concerns associated with this energy storage method. The review focuses on town gas and blended hydrogen storage, emphasizing leakage pathways and hydrogen reactivity. Experience from helium storage is used as an analogue to understand containment security, given the shared physicochemical properties of hydrogen and helium. Natural gas storage case studies are also investigated to highlight well integrity and safety challenges. Technical parameters identified as adverse to storage containment security, efficiency, and hydrogen reactivity are used to develop high-level and site-specific screening criteria. Thirty-two depleted offshore hydrocarbon reservoirs in the UK Continental Shelf (UKCS) are identified as potential storage formations based on these criteria. The screened fields are characterized by large hydrogen energy capacities, low cushion gas requirements, and proximity to offshore wind farms, indicating widespread geographic availability and potential for efficient UHS in the UKCS. The article proposes that analysis of existing helium concentrations and investigation of local tectonic settings are key site-specific criteria for identifying the containment security of depleted fields for stored hydrogen. The review also discusses the background of UHS research, including the challenges of hydrogen diffusion, sealing efficiency, wettability studies, production characteristics, and cushion gas selection. Case studies of underground town gas and hydrogen mixture storage, as well as helium and natural gas storage, are detailed to illustrate the practical experience and understanding of hydrogen behavior in the subsurface. The article concludes by emphasizing the importance of well integrity and hydrogen leakage prevention in UHS, drawing on lessons from underground natural gas storage (NGS) well integrity issues.The article reviews analogue case studies relevant to large-scale underground hydrogen storage (UHS), highlighting the technical challenges and safety concerns associated with this energy storage method. The review focuses on town gas and blended hydrogen storage, emphasizing leakage pathways and hydrogen reactivity. Experience from helium storage is used as an analogue to understand containment security, given the shared physicochemical properties of hydrogen and helium. Natural gas storage case studies are also investigated to highlight well integrity and safety challenges. Technical parameters identified as adverse to storage containment security, efficiency, and hydrogen reactivity are used to develop high-level and site-specific screening criteria. Thirty-two depleted offshore hydrocarbon reservoirs in the UK Continental Shelf (UKCS) are identified as potential storage formations based on these criteria. The screened fields are characterized by large hydrogen energy capacities, low cushion gas requirements, and proximity to offshore wind farms, indicating widespread geographic availability and potential for efficient UHS in the UKCS. The article proposes that analysis of existing helium concentrations and investigation of local tectonic settings are key site-specific criteria for identifying the containment security of depleted fields for stored hydrogen. The review also discusses the background of UHS research, including the challenges of hydrogen diffusion, sealing efficiency, wettability studies, production characteristics, and cushion gas selection. Case studies of underground town gas and hydrogen mixture storage, as well as helium and natural gas storage, are detailed to illustrate the practical experience and understanding of hydrogen behavior in the subsurface. The article concludes by emphasizing the importance of well integrity and hydrogen leakage prevention in UHS, drawing on lessons from underground natural gas storage (NGS) well integrity issues.