This sampling and geophysical survey has been carried out by, Institute of Geological Sciences (IGS) now British Geological Survey (BGS) for BGS, the survey took place from August to December 1974 in the Bristol Channel, Irish Sea and English Channel on board the MV Whitethorn. The purpose was to collect data as part of a geological mapping programme. Sample data were collected using Drilling equipment,: Rock Gravity Corer, Sediment Gravity Corer, Vibrocorer and Shipek Grab. These data are archived by BGS. Details of the survey are contained in IGS Annual Report 1974 and IGS report 79/8.