A presentation of geophysical and topographic survey results carried out by staff and students from the Department of Archaeology at the University of Southampton. The survey, conducted over three seasons, has revealed evidence for extensive settlement archaeology in the unexcavated areas of the outer and inner baileys of Old Sarum Castle. Geophysical survey in the fields outside the castle has also highlighted important structural evidence to the south, along the line of the Portway Roman Road. The surveys are carried out as part of the department’s policy of teaching students in a practical, fieldwork environment to collect data and present it in a professional report as part of their formal assessment. The University staff work in full consultation with colleagues from English Heritage and Historic England whose permissions, encouragement and practical help on site are a fundamental part of the success of the project.