Archaeological monitoring of all groundworks for a cable trench, carried out as per the scheduled monument consent and the CAT WSI. Archaeological monitoring was carried out at Wallbury Lodge, Dell Lane, Little Hallingbury, Essex during the excavation of a cable trench within the Iron Age oppidum (hillfort) of Wallbury Camp (NHLE 1002190). The trench was cut through modern layers into natural and no archaeological horizons were encountered, but the narrowness of the cable trench meant conditions were not ideal for observation.