When the particles that make up a material are strongly-correlated, we theorists get a run for our money: qualitatively new behaviour emerges and the whole is a lot more than the sum of its parts. The theoretical description of matter in such challenging circumstances benefits from very close interaction with experimentalists. For this reason the University of Kent has set up, as part of the SEPnet collaboration, a small outpost of theorists at the ISIS Facility in the Rutherford Appleton Laboratory.