Constant Leung is Professor of Educational Linguistics at King's College London, University of London. He was the founding chair of the National Association for Language Development in the Curriculum. His current research and educational activities include the development of an assessment framework for English as an Additional Language (Bell Foundation, 2016-).
He serves as Joint Editor of Language Assessment Quarterly. He is a Fellow of the Academy of Social Sciences, UK.
Brian Street was Professor Emeritus at King's College London, University of London, Visiting Professor of Education in the Graduate School of Education, University of Pennsylvania, Visiting Professor in the School of Education and Professional Development, University of East Anglia and Visiting Professor at the School of Education, University Federal de Minas Gerais, Brazil. In 2016, he received an honorary degree of Doctor of the University at The Open University, UK, in "recognition of academic and scholarly distinction and exceptional contribution in increasing our understanding of the nature of literacy and its significance in people's lives".