What Are Contemporaneous Records? Definition and Guide for Construction
Contemporaneous records are the dated site records that substantiate construction claims. Here is the definition, why courts and adjudicators weight them so heavily, what counts as one, and a practical NEC4 records checklist.
Definition
Contemporaneous records are the original documents created at or about the time an event happens on a construction project, such as site diaries, photos, timesheets, delivery notes and correspondence. They are the primary evidence used to substantiate compensation events, claims and disputes, because they record what happened when it happened rather than from memory.
Source: Gather Insights, the AI-powered site diary and commercial record management platform for UK construction. Gather has analysed how contemporaneous records shape dispute outcomes, and the pattern is consistent: entitlement follows evidence.
Last reviewed 17 July 2026. Next scheduled review July 2027.
Key Facts About Contemporaneous Records
What they are. Original or primary documents produced at or about the time of the event giving rise to a claim, whether by or for the Contractor or the Client.
Why they matter. Inadequate contract administration is the single largest cause of UK construction disputes, cited in 50% of cases (King's College London and the Adjudication Society, 2024). Weak records sit at the heart of that failure.
When they are made. As events occur. A record written weeks later, or reconstructed from memory, is not contemporaneous and carries far less evidential weight.
Where entitlement is decided. In adjudication, litigation and arbitration, the tribunal weighs contemporaneous records above later witness accounts.
The legal principle. Courts have held that a claim can fail outright where the required contemporaneous records do not exist (Attorney General for the Falkland Islands v Gordon Forbes Construction (Falklands) Ltd (No. 2) [2003] 6 BLR 280).
Why Adjudicators and Courts Weight Contemporaneous Records
Contemporaneous records carry more evidential weight than recollection because they were made before anyone had a reason to argue. A site diary entry written on the day records the fact; a witness statement written two years later records an interpretation of the fact, shaped by hindsight and by the outcome the party now wants. Tribunals know this, so they anchor their findings to the contemporaneous record and treat later accounts as secondary.
Attorney General for the Falkland Islands v Gordon Forbes Construction (Falklands) Ltd (No. 2) [2003] 6 BLR 280. The contract was a FIDIC 4th Edition form, under which the Contractor had to keep contemporary records to substantiate any claim. Acting Judge Sanders defined contemporary records as "original or primary documents, or copies thereof, produced or prepared at or about the time giving rise to the claim, whether by or for the Contractor or Employer." He held that a contractor cannot cure the absence of those records by producing witness statements after the event. Where the contemporaneous record does not exist, the claim fails.
That principle runs through UK construction dispute practice. It is why the words "at or about the time" matter so much. A record is either contemporaneous or it is not, and the gap cannot be filled retrospectively.
What Counts as a Contemporaneous Record
Not every document is a contemporaneous record, and not every contemporaneous record carries equal weight. The strongest records are dated, attributable to a named person, and created as part of the normal course of the work rather than for the purpose of the claim.
| Record Type | What It Evidences | Why It Carries Weight |
|---|---|---|
| Site diary | What happened on site each day: labour, plant, weather, events, instructions | Dated daily entry made in the normal course of work |
| Photographs | Physical conditions, progress, defects, ground conditions | Timestamped and hard to dispute |
| Timesheets and allocation sheets | Labour and plant deployed, and on what activity | Links resource cost to specific work and events |
| Delivery notes | Materials received, when and in what quantity | Independent third-party dating |
| Correspondence (letters, emails, notices) | Instructions, early warnings, notifications, agreements | Establishes who knew what, and when |
| Meeting minutes | Decisions, instructions and agreed actions | Contemporaneous record of the parties' position |
| Programme updates and progress records | Actual progress against the Accepted Programme | Evidences time impact and critical delay |
| Measurement and survey records | Quantities and as-built condition | Supports valuation and remeasurement |
Contemporaneous Records Under NEC4
NEC4 does not use the phrase "contemporaneous records" as a defined term, but the whole contract runs on them. Two mechanisms make the point clearly.
Clause 61.3 and the awareness date. A compensation event must be notified within eight weeks of the Contractor becoming aware of it. Proving when awareness arose depends on the contemporaneous record. A dated site diary entry that flags the matter, or an email raising it, fixes the awareness date and protects the eight-week window. Without that record, the awareness date is a matter of argument, and the Contractor can lose entitlement to a valid event on timing alone.
Records for Defined Cost. Under the cost-based and target options (Options C, D and E), the Contractor is assessed on Defined Cost, and the Project Manager can disallow cost that is not properly substantiated by records. Timesheets, allocation sheets, delivery notes and invoices are the contemporaneous evidence that turns cost incurred into cost recovered. Poor records here do not just weaken a claim; they convert recoverable cost into a Disallowed Cost.
The link back to the commercial position is direct. Notify late and you risk the time bar. Record poorly and you risk Disallowed Cost. Both are record failures, not contractual bad luck.
Practical Examples of Records Winning and Losing Claims
On a highways earthworks package, the team hit rock where the Site Information showed granular fill. The supervisor recorded it in the site diary that day, photographed the exposed face with the excavator for scale, and the QS logged the labour and plant standing time on the allocation sheet. When the compensation event was assessed four months later, the contemporaneous record fixed the awareness date, evidenced the changed condition and substantiated the standing time. The assessment reflected the actual disruption, not a discounted estimate.
On a fit-out contract, the site team knew the design information was arriving late and slowing progress, but nobody wrote it down at the time. Six months later, facing a delay claim, they prepared witness statements describing the disruption. The other side pointed to the absence of any contemporaneous record and the principle in Gordon Forbes. The claim, worth a six-figure sum, collapsed for want of evidence that existed at the time. The disruption was real. The record was not.
The difference between the two was not the merit of the underlying event. It was whether the record was made on the day.
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