Archaeological excavations within the area of the future Nano Fabrication Building on the Cavendish Site, Madingley Road, Cambridge, were conducted by the Cambridge Archaeological Unit to investigate archaeological features identified in the evaluation. The excavation revealed a length of the Iron Age ditch and a post-Medieval backfilling of medieval ridge and furrow fieldsystem. One further possible feature was identified as a tree throw. The lack of Romano-British period features on the site would suggest that the former Vicars Farm Romano-British settlement was limited to that area of excavation and did not extend this far to the south.