The original Guidebook was written by Katherine Cowan, Senior Adviser to the JLA, and Sandy Oliver, Professor of Public Policy at the Social Science Research Unit and EPPI-Centre, Institute of Education, University of London.  Katherine oversaw versions 1 – 5.  The JLA team at the School of Healthcare Enterprise and Innovation, University of Southampton, and Katherine Cowan, with input from the JLA Advisers, have updated versions 6 onwards.