text: Marrow's research focuses on the degradation of structural materials, the role of microstructure, and the mechanisms of materials ageing. A key aspect is the investigation of fundamental mechanisms of damage accumulation - including irradiation - using novel materials characterisation techniques. This has concentrated recently on computed X-ray tomography and strain mapping by digital image correlation and digital volume correlation, together with X-ray and neutron diffraction. He applies these techniques to study the degradation of Generation IV nuclear materials such as graphite and silicon carbide composites, as well as new materials for electrical energy storage.