She is professor of Medieval history at the University of Southampton and dean of the Faculty of Humanities.
She is former editor of the Journal of Medieval History, and a specialist in the Hundred Years' War.
She graduated with BA and MA degrees from the University of Manchester before obtaining a PhD from Teesside Polytechnic on "Military Organization in Lancastrian Normandy 1422–50".
She was also a vice-president of the Royal Historical Society.
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