1. School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
2. Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, UK
3. National Nuclear Laboratory, Springfields, Salwick, Preston, PR4 0XJ, UK
4. Sellafield Ltd, Sellafield, Seascale, Cumbria, CA20 1PG, UK