Investigation Report Template for the UK
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What is an Investigation Report?
An investigation report (sometimes called an investigation template, investigation report template, inquiry report template or workplace investigation report) documents the findings, evidence and conclusions from a formal inquiry into a workplace incident, misconduct allegation or compliance issue. In England & Wales it records the facts, the evidence reviewed and the investigator's conclusions on the balance of probabilities, so an organisation can show it followed a fair and thorough procedure.
A good report sets out witness statements, documentary evidence and a clear timeline of events, forming the basis for disciplinary decisions or corrective action. It should meet the standards in the ACAS Code of Practice on Disciplinary and Grievance Procedures and relevant employment legislation, particularly when addressing grievances, harassment claims or suspected breaches of company policy. Strong reports stick to the facts, avoid speculation and give clear recommendations while keeping confidentiality.
You can download a tailored investigation report template with GenieAI for free, drafting it to your own policy, rules and context rather than filling in generic wording. If you also need to capture the first account of what happened, pair it with an incident report. For a worked example of what the finished document looks like, see the sample clauses below.
Sample clauses: standard wording in a UK investigation report
4. Scope of Investigation and Evidential Standard
4.1 The Investigating Officer was appointed on [date] by [appointing manager] and instructed to establish the facts relating to the allegations set out at paragraph [3.2], and to no other matter, save where a further concern arose during the investigation and was expressly added to the terms of reference in writing.
4.2 The Investigating Officer has made findings of fact on the balance of probabilities, has recorded where the evidence was insufficient to reach a finding, and has not expressed any view on the appropriate sanction or outcome, that being a matter for the decision maker at any subsequent [disciplinary / grievance] hearing.
4.3 Each witness interviewed was provided with a copy of the note of their interview and invited to confirm its accuracy within [5] working days; where a note was not confirmed, that fact is recorded in Appendix [B] and the weight given to the evidence is stated.
4.4 This report has been prepared having regard to the ACAS Code of Practice on Disciplinary and Grievance Procedures and to the [Employer]'s [Disciplinary Policy], and any departure from either is identified and explained at paragraph [7.4].
9. Confidentiality, Disclosure and Retention
9.1 This report and its appendices are confidential and are disclosed only to the decision maker, the [Employer]'s HR function, its legal advisers and the employee who is the subject of the allegations, subject to paragraph 9.2.
9.2 Witness evidence may be anonymised or redacted before onward disclosure where the Investigating Officer considers there is a genuine risk of detriment to the witness, provided the subject employee is given sufficient information to respond meaningfully to the case against them.
9.3 Personal data in this report is processed for the purposes of the [Employer]'s disciplinary and grievance procedures in accordance with the UK General Data Protection Regulation and the Data Protection Act 2018, and will be retained for [12] months following conclusion of the matter unless a longer period is required for legal proceedings.
Illustrative extract showing typical drafting under the law of England and Wales. Documents generated with GenieAI are tailored to your rules, standards and context.
Frequently Asked Questions
When should you use an Investigation Report?
Use an Investigation Report when serious workplace incidents or allegations demand formal documentation and review. Common triggers include employee misconduct, discrimination claims, health and safety incidents, data breaches, or suspected fraud. Creating this report becomes essential once HR or management decides an issue needs thorough examination.
The report proves particularly valuable when facing employment tribunals, regulatory inquiries, or internal appeals processes. UK employers must show they've followed fair procedures under the Equality Act 2010 and ACAS guidelines. Starting the investigation promptly helps preserve evidence, protect witness memories, and demonstrate your commitment to addressing concerns properly.
The main benefit of a consistent template is that every inquiry across the business is documented to the same standard, which protects the organisation and gives staff confidence that concerns are handled fairly.
What are the different types of Investigation Report?
- Workplace Misconduct Reports: Focus on employee behavioral issues, policy violations, or professional conduct concerns, typically led by HR departments
- Health and Safety Investigation Reports: Detail accidents, near-misses, or safety breaches, following HSE guidelines and regulations
- Discrimination and Harassment Reports: Address claims under the Equality Act 2010, requiring special attention to protected characteristics
- Financial Irregularity Reports: Examine suspected fraud, accounting discrepancies, or financial control failures
- Data Protection Reports: Document personal data breaches or GDPR compliance issues, often following ICO guidance
Who should typically use an Investigation Report?
- HR managers: often lead workplace investigations and compile the final report, especially for misconduct or grievance cases
- Line managers: provide input and evidence, help identify witnesses, and implement resulting recommendations
- External investigators: brought in for complex cases or where independence matters, particularly in regulated industries
- Operations and compliance leads: use a consistent template so each inquiry is documented to the same standard across the business
- Regulatory bodies: may receive the report in serious cases, such as the HSE for accidents or the ICO for data breaches
How do you write an Investigation Report?
- Initial Documentation: Gather relevant policies, procedures, and any formal complaints or incident reports
- Plan the inquiry: Set clear terms of reference, agree who leads, and draw up an investigation plan covering what needs to be established and by when
- Witness Statements: Record detailed accounts from all relevant parties, using consistent interview formats
- Evidence Collection: Secure emails, CCTV footage, documents, or physical evidence before they're lost or altered
- Timeline Creation: Map out key events chronologically, noting dates, times, and locations precisely
- Report Structure: Our platform helps organise findings logically, ensuring compliance with ACAS guidelines and employment law requirements
- Confidentiality: Mark sensitive information appropriately and limit report distribution to essential parties
What should be included in an Investigation Report?
- Executive Summary: Clear statement of investigation scope, trigger events, and key findings
- Methodology Section: Details of investigation process, interviews conducted, and evidence gathered
- Evidence Analysis: Factual presentation of findings, supporting documentation, and witness statements
- GDPR Compliance: Data protection statements and handling of personal information
- Conclusions: Objective assessment of evidence and findings against relevant policies or laws
- Recommendations: Specific, actionable steps to address identified issues
- Authentication: Date, investigator details, and signatures of relevant parties
What's the difference between an Investigation Report and an Incident Report?
While both documents examine workplace issues, an Investigation Report differs significantly from an Incident Report. Investigation Reports provide comprehensive analysis of complex situations, often involving multiple incidents, witnesses, and evidence sources. Incident Reports, in contrast, focus on documenting specific events shortly after they occur.
- Scope and Depth: Investigation Reports involve detailed analysis and recommendations, while Incident Reports capture immediate facts and initial responses
- Timeline: Investigation Reports may take weeks to complete and examine patterns over time; Incident Reports are typically completed within 24-48 hours of an event
- Legal Weight: Investigation Reports often form the basis for disciplinary actions or legal proceedings, requiring stricter adherence to ACAS guidelines and employment law
- Purpose: Investigation Reports aim to uncover root causes and recommend solutions, while Incident Reports primarily document what happened for record-keeping
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About the Investigation Report
- Initial Documentation: Gather relevant policies, procedures, and any formal complaints or incident reports
- Plan the inquiry: Set clear terms of reference, agree who leads, and draw up an investigation plan covering what needs to be established and by when
- Witness Statements: Record detailed accounts from all relevant parties, using consistent interview formats
- Evidence Collection: Secure emails, CCTV footage, documents, or physical evidence before they're lost or altered
- Timeline Creation: Map out key events chronologically, noting dates, times, and locations precisely
- Report Structure: Our platform helps organise findings logically, ensuring compliance with ACAS guidelines and employment law requirements
- Confidentiality: Mark sensitive information appropriately and limit report distribution to essential parties
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