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.
When a watching brief is usually chosen
A watching brief is often used where archaeological potential exists but the level of uncertainty or expected impact does not justify a full excavation in advance.
- It may be suitable where the scope of ground disturbance is limited or where earlier assessment suggests lower to moderate risk.
- It is commonly attached to smaller developments, service trenches, foundation works or other monitored excavation stages.
- It allows archaeology to be observed in real time as the contractor undertakes the agreed groundworks.
- The exact scope should be defined in the approved WSI before works begin.
What the archaeologist does on site
During the watching brief, the archaeologist is not replacing the contractor. The role is to observe, inspect, record and advise when archaeology is exposed.
- Ground reduction, trenching or foundation excavation is monitored at the agreed stages and in the agreed areas.
- If archaeological deposits or features appear, they are investigated and recorded within the limits of the approved methodology.
- Finds, samples, plans, levels and photographs may be taken depending on what is encountered.
- Communication with the site team is important so that any necessary pauses are managed efficiently and safely.
What clients should expect afterwards
The watching brief does not end when the groundworks are complete. Reporting is part of the archaeological obligation.
- A written report is normally produced explaining what was observed and what, if anything, was found.
- If no archaeology is present, the report still provides evidence that the condition has been fulfilled.
- If significant remains were exposed, further steps may occasionally be required depending on the agreed procedure and findings.
- The final report supports the condition discharge process and creates a record for future reference.
Frequently asked questions
Does a watching brief stop construction?
Not by default. It is designed to work alongside construction, although significant discoveries may require short pauses depending on the agreed process.
Will the archaeologist be on site all the time?
That depends on the scope of monitored works. The WSI usually defines which operations need attendance.
Can a watching brief find nothing?
Yes, and that is still a valid result. The purpose is to monitor and record what is present or absent during the agreed works.
Need advice on this type of project?
AS Archaeology & Heritage Services delivers archaeological watching briefs that are well coordinated with site operations and supported by the reporting needed for planning compliance.
Related links: Archaeological Fieldwork | Written Scheme of Investigation | Contact AS Archaeology