Dr. Louis McCartney received his bachelor’s and master’s degrees and PhD in Applied Mathematics at Manchester University. He has since worked at the NPL, currently as an NPL Emeritus Senior Fellow, acting as a consultant to the Engineering, Materials and Electrical Science Department, where his work focuses on studying continuum thermodynamic models of electrolytes, including application to polymer electrolyte membrane (PEM) fuel cell and battery modelling and the modelling of nanostrain in multi-layered piezoelectric systems subject to complex loading involving mechanical, thermal and electric stimulation. He has worked as a Visiting Professor at the Department of Materials Science and Engineering, University of Surrey (March 1995 to August 2010) and a Visiting Professor at the Centre for Collaborative Research, University of Tokyo, Japan (1 February 1999–8 May 1999). He is a Fellow of the Institute of Mathematics and its Applications.