New survey to reveal "Britain's Atlantis"

Professor David Sear, of the University of Southampton, and marine archaeologist Stuart Bacon, will explore the ancient sunken city, off the Suffolk coast, in the early summer.

Dunwich, fourteen miles south of Lowestoft, was once a thriving port, and in the 14th century similar in size to London. However, storms, erosion and floods over the past six centuries have almost wiped out this once prosperous city, and the Dunwich of today is a quiet coastal village.

The project will use the latest underwater acoustic imaging technology to assess the existence of any remains from the city that lies between 10ft (3m) and 50ft (15m) down.

Professor Sear comments: 'We will be applying new technology to the investigation of what has become known as “Britain's Atlantis”, and making this information publicly available. Technical advances, such as side-scan multibeam sonar have massively improved our ability to create accurate acoustic images of the seafloor, and this survey should greatly enhance our knowledge of the site.'

Diving evidence suggests the site contains debris from at least two churches and a priory, but underwater visibility at the location is very poor, and no one has any idea what remains (if any) exist from the medieval settlement that was lost in the 13th and 14th centuries.

Stuart Bacon, Director of the Suffolk Underwater Studies, first located the lost city in the 1970s and has dived there many times. He and Professor Sear hope to begin exploring the seabed in June.

The city-scale survey of the sea floor will provide information on the location and state of any structures of archaeological interest in relation to historical records. The findings will be presented as a new public display for the Dunwich Museum, documenting the technology used and what the project has revealed of the lost city.

The expedition is being funded by a £20,000 donation from the Esmée Fairbairn Foundation. The GeoData Institute, a University of Southampton-based research and consultancy group, is managing the project and dealing with collation and digital capture of the data and interpretation, while EMU Ocean Survey are conducting the actual survey.