Trett has had a long career in museums. He was Curator at Chertsey
Museum, then at King's Lynn Museum, and was Museum Officer at
Newport Museum and Art Gallery until he retired. Since then he
has been actively involved in local archaeology and history.
has been Chairman of the Glamorgan Gwent Archaeological Trust,
and Vice Chairman of the Gwent Wildlife Trust.
current projects include the study of Historic Caerleon and the
History of the Newport Mediaeval Ship.
has frequently been interviewed on radio and television, including
appearing on the BBC series The House Detectives