A watching brief is one of the most common forms of planning-led archaeological work, but it is also one of the least understood by clients. In essence, an archaeologist monitors specified groundworks and records any archaeological remains exposed during those works. The process is usually targeted, practical and tied closely to the construction sequence rather than running as a separate excavation project.
Archaeological planning conditions can seem opaque if you do not deal with heritage work regularly. In practice, they usually follow a recognisable sequence: confirm what the condition requires, agree the method through a WSI, complete the fieldwork if needed, and submit the results so the local authority can sign off the requirement. Understanding that sequence helps clients turn a vague condition into a clear action plan.
When archaeology conditions appear on a planning consent, applicants often ask which kind of fieldwork will follow. The three terms heard most often are watching brief, evaluation and excavation, but they are not interchangeable. Each one serves a different purpose, and the type required depends on how much is already known about the site and how significant the likely archaeology may be.