This complex project at one of the country’s most eminent castles was successfully carried out in three continuous phases. Following a rope access survey, works were specified to 80% of the ruinous fabric including consolidation of the cappings, masonry and historic plasterwork. The technical aspects of the work involved an analysis and understanding of the external and internal characteristics of the ruins as well a careful choice of materials and techniques, which had to perform at an optimum level for such a harsh environment. We were also mindful that all our interventions had to sit back in the overall aesthetics of this historic site. Close liaison with the National Trust throughout meant that visitor access was continuous and that outreach and education initiatives formed an integral part of our work at the castle. NVQ Students from Bath College of Stonemasonry were employed on this project.