Further archaeological investigation including strip-map-and-record, or full archaeological excavation will be required on either a known site of archaeological significance – which can be based on documentary evidence and/or geophysical survey and lidar data – or if significant archaeological finds are discovered unexpectedly during a Watching Brief. Full excavations will require more resources in fieldwork, post-excavation analysis of artefacts and soil samples, and in reporting.

Archaeological programmes of work should be thought of as sequential staged programmes, with in many cases evaluation as the initial stage, progressing to watching brief or full area stripping, then to full excavation. In cases where the site is not considered to have high archaeological potential, the evaluation stage may be sidestepped altogether. The condition can be discharged at any of these stages without any further work required on the site, if there is no archaeology observed, or sites with sparse archaeology that can be mitigated with limited investigation.