Institute of Archaeology-UCL BA (1980) & PhD (1991) (Settlement and Pottery of the Vinalopo Valley (Alicante), AD 400-700), providing a detailed review of ceramics and trade in W Mediterranean ports (published as BAR 588 & 604 in 1993, 1995). Have studied-published Hellenistic, Roman and Islamic ceramics from excavations in Spain (Alicante, Cartagena, Valencia), Roman Syria (Beirut, Chhim, Homs, Basit, Zeugma), Albania (Butrint, Durres), Greece (Athens, Corinth, Thesprotia, Nicopolis, Patras), Bulgaria (Nicopolis, Dichin) and N Africa (Carthage, Utica, Leptis Magna).
Author of Trade in the Western Mediterranean AD 400-700: the ceramic evidence, BAR 604 (1995); Hispania and the Roman Mediterranean, AD 100-700: Ceramics and Trade (2010) and Butrint 6, Volume 3. The Roman and Late Antique Pottery from the Vrina Plain Excavations (2020). Co-editor of the series Roman and Late Antique Mediterranean Pottery (Archaeopress, Oxford).