Horton attended
Peterhouse, Cambridge, graduating and receiving a doctorate. He is Professor of Archaeology and Cultural Heritage at the
Royal Agricultural University in
Cirencester, and Emeritus Professor at the
University of Bristol. One of his former students is the archaeologist and television presenter
Sam Willis. He is part of a project to establish the Cultural Heritage Institute in the former
Great Western Railway carriage works at
Swindon, offering research and masters training from 2020. He has conducted excavations in
Zanzibar, Egypt, the Caribbean, North America, Central America and France, as well as sites in Britain. His chief publications are on the Swahili site of
Shanga,
Kenya, between 1980 and 1986 and more recently sites on the islands of Zanzibar and Pemba, notably Tumbatu, Ras Mkumbuu, Mtambwe Mkuu and Chwaka. His other excavations include the Scottish
Darien scheme (1698–1700) in
Panama; the
Cistercian Abbey of Grosbot (Charente, France); the
Bishop's Palace, Wells, Somerset; a medieval farmstead at Carscliffe,
Somerset; Fishmongers Cave,
Alveston, Gloucestershire, and he worked at
Berkeley Castle (Gloucestershire) and
Repton. In 2008-19 he undertook survey and excavation work in the Kherlen Valley in
Mongolia. Between 2011 and 2019 he worked with the Sealinks Project, undertaking excavations on Pemba, Zanzibar, Mafia,
Anjouan,
Sri Lanka and
Madagascar. A project in East Pemba combined archaeological investigations with ethnography and anthropology. He also has an interest in
Isambard Kingdom Brunel and directed the digitisation of the engineer's sketch books and letters at Bristol University library, which project was grant-aided by the Arts and Humanities Research Council in 2003. He is currently Pro Vice-Chancellor, Research & Enterprise at the
Royal Agricultural University. He was elected a Fellow of the
Society of Antiquaries of London on 7 May 1992. ==TV career==