RUEDI (Relativistic Ultrafast Electron Diffraction and Imaging) will be the world’s most powerful microscope for imaging dynamics and position the UK as a global leader in the field. It will enable the dynamic, rather than static, study of biological and chemical processes in ‘real time’ as they happen and at the femtosecond timescale. This is akin to the difference between seeing the final score in a football match and being able to observe all the action that takes place before