The Mary Lyon Centre, the national MRC facility for mouse genetics

The Mary Lyon Centre at MRC Harwell stores, breeds, and distributes genetically altered mice for UK researchers studying human disease. This facility addresses a critical bottleneck: generating and maintaining specialised mouse strains is expensive and technically demanding, so many research groups lack the resources to do it themselves. The MLC provides centralised infrastructure—including the National Mouse Archive, where scientists can deposit strains free of charge—so that valuable genetic models are not lost when a single lab’s project ends. It also serves as the hub for the MRC National Mouse Genetics Network, connecting experts across the UK to share tools and expertise. If the MLC succeeds, it will accelerate the pace of fundamental biomedical research. Mouse models are essential for understanding how genetic mutations cause conditions such as cancer, diabetes, and neurodegenerative disorders. By making these models reliably available and preventing duplication of effort, the centre saves time and public money. This is primarily an infrastructure project, not a single experiment—it quietly keeps the machinery of genetic discovery running, much like a national library keeps knowledge accessible. Without such facilities, progress in translating genetic findings into therapies would slow considerably.