Keith Stringer is Professor of Medieval British History at Lancaster University. His research focuses on medieval state-making, noble power-structures, religious reform, cultural exchanges, and the construction of individual, national and supra-national identities, with the emphasis on the developing Scottish and English polities (1100-1300), and the world of 'middle Britain' (1100-1400). His most recent publications include The Kings of Scots, the Liberty of Penrith and the Making of Britain (1237-1296) (2019), as well as (with others)  Northern England and Southern Scotland in the Central Middle Ages (2017), and The Normans and the 'Norman Edge': Peoples, Polities and Identities on the Frontiers of Medieval Europe (2019).