Peer review of a technical report: scope and value

A peer review of a technical report in planning is worth commissioning when the report carries the decision and you cannot afford to find out at appeal that the method was wrong. It is not worth commissioning as reassurance. The distinction matters because a review costs a fraction of the original fee and delivers a fraction of the certainty, and consultants who sell it as validation are overselling it.

What a review buys is a competent second reading of the method, the inputs and the logic by someone with no stake in the conclusion. That is useful, and it is narrower than most clients assume.

What a review can and cannot establish

A reviewer working from the submitted document can tell you whether the assessment followed the relevant standard, whether the inputs are stated clearly enough to be checked, whether the calculations are internally consistent, and whether the conclusion follows from the evidence presented.

A reviewer cannot tell you whether the sound level meter was calibrated, whether the tree condition scores reflect what is on site, whether the borehole logs describe the ground that was actually drilled, or whether the survey happened at all.

That table is the honest answer to most briefs. Where a client needs the fourth row answered, the review has to include a site visit or a repeat survey, and the fee changes accordingly.

Desk review against re-performing the work

Three levels of scrutiny exist, and they should be priced separately.

A conformity check reads the report against the governing standard and lists departures. For acoustics that means BS 4142:2014+A1:2019, for trees BS 5837:2012, for daylight and sunlight the BRE 209 guidance, for landscape the third edition of the landscape and visual impact assessment guidelines, for ecological impact assessment the CIEEM guidelines, and for contaminated land BS 10175:2011. An hour or two of a competent reviewer's time, and it finds the obvious failures.

A technical audit goes further. It recalculates from the stated inputs, tests the sensitivity of the conclusion to the assumptions, and identifies which assumptions would change the answer. This is where most of the value sits.

Re-performance repeats the underlying work. A fresh survey, a fresh model, a fresh appraisal. It is the only level that answers questions about the fieldwork, and it costs what the original cost.

Most clients ask for the first and need the second.

Scoping the review in writing

An unscoped review produces an unusable deliverable, usually a short memo saying the report appears broadly in accordance with good practice. That sentence protects the reviewer and helps nobody.

Specify:

1. The documents under review, by title and revision number, and anything deliberately excluded.
2. The standard or guidance the review is to be conducted against, named explicitly.
3. The level of scrutiny: conformity check, technical audit or re-performance.
4. Whether a site visit is included.
5. The decision the review is to inform, stated plainly. Whether to submit, whether to appeal, whether to challenge a council's own consultant.
6. The deliverable format, and whether it is to be capable of being submitted to the authority or kept internal.
7. Who the reviewer's duty runs to, and whether the report may be relied on by a third party such as a funder.

Point six changes how the document is written. A review intended for the authority reads differently from one intended to tell a client how exposed they are.

Who is suitable to review whom

Same discipline, equal or greater standing, no conflict. A reviewer should hold the chartered status or competence that the original author's work required, and for disciplines with a register or licence that is a bright line. The logic is the same as choosing an acoustician whose qualifications a council will accept or understanding what registration of an archaeological organisation actually means.

Avoid the obvious conflicts: a reviewer in the same firm, a reviewer who was shortlisted for the original commission, a reviewer who has worked for the objector. And check the professional indemnity position, because a review relied on by a funder needs cover in place for that reliance.

Seniority cuts both ways. A reviewer who is too junior will defer to the original author. One who is too senior and commercially competitive may find problems that are really differences of professional preference. The useful reviewer distinguishes between a departure from the standard and a judgement they would have made differently, and says which is which.

Handling a review that finds a problem

Assume it will find something. Most do, and most findings are minor.

The decision tree is short. Where the finding is a presentational or traceability issue, fix it and resubmit. Where it changes a conclusion, the report has to be corrected before it is relied on. Where the original author disagrees, get the two of them in a meeting rather than exchanging letters, because disciplinary disputes between consultants consume weeks and resolve in minutes face to face.

Where the report has already been submitted and the finding is material, the position is uncomfortable and the honest route is usually the cheapest. A corrected report submitted voluntarily is a procedural inconvenience. A material error found by a third party after permission is a challenge risk, and knowingly leaving misleading information in front of a decision maker is a professional conduct problem for whoever is advising.

Disclosing a review to the authority

There is no general obligation to hand the authority a review you commissioned. Whether to do so is tactical.

Disclose where the review strengthens the submission, where it rebuts the council's own consultant, or where it demonstrates that a contested assumption was tested. Keep it internal where it is an exploration of weakness rather than a finding.

Be aware that many authorities commission their own independent audit and recover the cost from the applicant. That is routine for Viability Assessment work and for a Basement Impact Assessment in boroughs with basement policies, and it means your report will be reviewed whether or not you review it first. Reviewing it first is simply cheaper than being surprised.

When a review is worth its cost

Commission a review where the report carries the planning balance, where a refusal would be expensive, before lodging an appeal, where a third party objector has technical capability, or where a funder or purchaser will rely on the document.

Skip it where the report is a validation requirement with no contested issue, where the fee for the review approaches the fee for redoing the work properly, and where the real problem is that the original brief was too thin. A bad brief produces a weak report, and reviewing a weak report tells you what you already knew.

The one case where a review almost always pays for itself is before appeal. An inspector will be shown the report by both sides, and the cross examination at an inquiry, or the rebuttal in written representations, is where an unexamined assumption gets exposed in public.

If you need a reviewer with the right discipline and standing to check or sign off a draft, the professional directory is the route to one.

This is general guidance, not legal advice. For specialist technical reports, qualified professional input may be required. Check the position with your local planning authority or a qualified professional before relying on it.

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