My main research interests are hagiography and pseudo-history of the medieval Celtic regions. See Research Portal profile for a full list of publications.

I gained my PhD from the Centre for Medieval Studies, University of Toronto, in 1996, with a dissertation on The Medieval Cult of St Petroc. After a period teaching and working as a copy-editor on the Dictionary of Old English in Toronto, I was a postdoctoral researcher at the School of Celtic Studies, Dublin Institute for Advanced Studies, then  Lecturer/Senior Lecturer at the University of Wales Lampeter. My research and teaching mainly concern the medieval history and literature (Latin and vernaculars) of the Celtic regions, in particular Wales, Cornwall and Brittany.