Appointing an ecological clerk of works on site

An ecological clerk of works has no power to stop anything unless somebody gives them that power in writing. The condition says an ECoW shall be appointed to supervise the works. The contractor reads that as a visiting ecologist who writes reports. Then a machine goes through a hedgerow in the middle of the breeding bird season and everyone discovers that supervision was never defined. Appointing an ECoW properly means settling four things before the appointment: scope, competence, authority and reporting.

What the role does and when it is required

The role sits between the ecological evidence submitted with an application and what actually happens on site. Its purpose is to make sure the mitigation described in the ecological reports is delivered in the sequence and the manner described.

Two documents usually create the requirement. The first is a planning condition, often attached to a construction environmental management plan for biodiversity, requiring ecological supervision of specified operations. The second is a European protected species licence issued by Natural England, where the method statement names the supervision arrangements as part of the licensed activity.

The two are not the same and the distinction matters. Breaching a condition is a planning matter. Working outside the terms of a species licence is a criminal offence under the Conservation of Habitats and Species Regulations 2017 and the Wildlife and Countryside Act 1981, and the licence holder carries that exposure personally.

Typical triggers for attendance are vegetation clearance, soft strip of a building with a confirmed or potential roost, demolition of structures, works within root protection areas, trenching and excavation where reptiles or amphibians are present, and the installation of mitigation features such as bat boxes and hibernacula.

Competence, and the experience that matters on site

Membership of the Chartered Institute of Ecology and Environmental Management at an appropriate grade is the usual starting point, and for licensed work the individual will often need to be a named ecologist on the licence or to be working under the direct supervision of the licence holder.

Site experience is the part that gets skipped. An ecologist who is excellent at survey and reporting is not necessarily able to stand in front of a groundworks gang at 7am and change the sequence of the day's work. Ask for three things: recent examples of supervision on comparable sites, familiarity with construction programmes and method statements, and a Construction Skills Certification Scheme card, without which most principal contractors will not let them past the gate.

Where the scheme carries a Protected Species Survey, remember that surveys and any mitigation licence require a suitably licensed ecologist under the Wildlife and Countryside Act 1981 and the 2017 Regulations. A draft prepared by any other route is a starting point for that professional, never a substitute. The same applies to a Biodiversity Net Gain Assessment, where the Environment Act 2021 regime expects the statutory metric to be completed by a competent person and the biodiversity gain plan to be approved by the local planning authority.

The authority to stop works, and how it is conferred

This is the heart of it. An ECoW's ability to halt an operation comes from the contract, not from the profession.

Set it out in three places. In the appointment, which should state that the ECoW may direct the cessation of a specified operation where continuing would breach a licence, a condition or wildlife legislation. In the construction contract or subcontract, so the instruction binds the people holding the machines. And in the site induction and the method statement, so that the operatives have heard it before they need to act on it.

Add an escalation route with names. An ECoW who stops work should be contacting the site manager immediately and the client's project manager the same day, with a written non-conformance record following within 24 hours. Without that route the stoppage becomes a dispute between an ecologist and a foreman, which the ecologist loses.

Agree in advance what happens to the programme and the cost when a stoppage occurs. A contract that is silent on this creates pressure on the ECoW not to use the power at all.

Records, toolbox talks and reporting

The paperwork is what demonstrates compliance later, and it is usually the thing the local planning authority asks for when discharging the condition.

• A dated site diary of every visit, what was inspected, what was found and what was instructed.
• Photographic records of mitigation features as installed, with locations.
• Toolbox talk records with attendance lists, delivered before each sensitive operation rather than once at the start.
• Non-conformance records, with the corrective action and the date it was closed out.
• A closing report to the authority, matched to the wording of the condition.

Where a species licence is in place, Natural England will expect returns in the form the licence specifies, and those go in whether or not anything went wrong. Keep the licence reporting and the planning reporting as separate documents, because they answer to different regulators and have different deadlines.

Where part-time attendance is enough

Full-time attendance is rarely justified and rarely paid for. A risk-based attendance schedule is the normal arrangement and it is easier to enforce.

Write the schedule around triggers rather than around days. Attendance required before and during vegetation clearance. Attendance at the soft strip of the roof void. A watching brief during trenching in the eastern half of the site. Weekly inspection during the installation of mitigation features. Availability at 24 hours' notice for anything unexpected.

Then add the one clause that makes it work: no operation on the trigger list may proceed without the ECoW present or having given written clearance for that specific operation. Without it, a contractor under programme pressure will proceed and apologise.

Seasonal constraints shape the schedule too. Breeding birds from March to August, bat emergence surveys through the summer, reptiles active from April to October. An ECoW appointed in January for a February start is dealing with a different set of risks from one appointed in May, and the validity of the survey work behind it all has to be checked at the same time.

Writing it into the method statement

Draft the appointment before the condition is discharged, not afterwards. The submission to the authority should name the role, the competence requirement, the trigger list, the authority to stop work, the reporting outputs and the retention period for records.

That level of detail does two things. It gives the case officer a document they can approve without a round of questions, and it gives the contractor something to price accurately rather than a line for ecological attendance as required.

Where the wider ecological baseline still needs assembling, a Preliminary Ecological Appraisal is the document that identifies which operations need supervision in the first place. Find a reviewer in the PlanScope professional directory if you need a suitably qualified ecologist to review a draft before it goes in.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.