Reporting Legionnaires’ disease is not one UK phone call. A clinical notification, a public-health investigation and a RIDDOR report are different channels with different triggers and different owners. The country matters because public-health notification routes are not identical across England, Wales, Scotland and Northern Ireland.
The duty holder’s job is not to diagnose the illness. It is to know which public-health body may contact them, where to send cooperation and records, and when a separate work-related RIDDOR report may be needed.
Four-nation notification map
| Nation | Public-health route | What the site escalation card should say |
|---|---|---|
| England | UKHSA Health Protection Team route for notifiable diseases [1] | Local HPT contact, RIDDOR link, responsible person, out-of-hours contact and record location. |
| Wales | Public Health Wales AWARe for urgent notifiable disease matters; Welsh regulations list Legionnaires’ disease and Legionella spp. [2][3] | AWARe phone/email route, local environmental health contact, responsible person and records. |
| Scotland | Public Health Scotland Legionnaires’ disease guidance; Legionella genus is a notifiable organism and enhanced surveillance applies [4] | Local health protection team / PHS route, responsible person and records. |
| Northern Ireland | Public Health Agency Northern Ireland; suspected cases are legally required to be reported to PHA [5] | PHA route, HSENI/district council details where relevant, responsible person and records. |
This table is about clinical/public-health reporting. It does not decide whether you have a RIDDOR duty, and it does not replace cooperation with investigators once a case is linked to a premises.
Decision tree for duty holders
- Has a clinician or laboratory identified a suspected or confirmed case? The clinical notification normally sits with the clinician or laboratory through the national route, not with the building owner [1][2][4][5].
- Has public health contacted your site as a possible exposure location? Preserve records, name one incident lead, provide access, and coordinate any sampling or remedial action before destroying potential evidence.
- Is there reasonable evidence the case was caused by exposure at work? Consider RIDDOR. HSE’s RIDDOR route is separate from clinical notification and applies where the disease-reporting criteria are met [6][7].
- Do you operate a cooling tower or evaporative condenser? Check the standing notification to the local authority; that is a separate duty from incident reporting [7].
- Is the site in Northern Ireland? Use the NI regulator and PHA route, not an England-only UKHSA card.
The safest incident card has both layers: public-health notification route by nation, and RIDDOR/workplace reporting route where the facts make it relevant.
What to preserve
When public health calls, the evidence they need is usually already in your system. Pull the current risk assessment, schematic, asset list, temperature and flushing records, sampling results, remedial-action log, contractor visit reports, cooling-tower registration if relevant, and the responsible-person record.
Do not rush to disinfect every suspect outlet before investigators have agreed the sampling plan. There can be a real tension between immediate risk reduction and preserving evidence. If people are exposed to a credible active source, isolate it; if the issue is historic or controlled, coordinate first. Document every call, name and instruction.
For a group operating in more than one nation, rehearse this before an incident. Ask a site manager in each nation to find the public-health contact, the risk assessment, the latest monitoring records and the responsible person’s out-of-hours number. If that takes more than a few minutes in peacetime, it will fail under pressure.
FAQ
Does the duty holder report every Legionnaires’ disease case?
No. Clinical notification normally comes from the medical or laboratory side through the national public-health route [1][2][4][5]. The duty holder becomes active when their premises is a possible source, when investigators request records or access, or when a separate RIDDOR duty may apply.
Is RIDDOR the same as public-health notification?
No. RIDDOR is a work-related health-and-safety reporting route. Public-health notification is about suspected or confirmed infectious disease and investigation. The same case can involve both, but they are not the same report and should not be collapsed into one action [6][7].
Should a UK-wide company use one escalation card?
Use one format, not one country route. The card should have a nation field that changes the public-health contact: UKHSA for England, Public Health Wales AWARe for Wales, Public Health Scotland / local HPT routes for Scotland, and PHA Northern Ireland for Northern Ireland.
Next step
Update the first page of your incident procedure. Add four rows, one for each nation, with the correct public-health route, regulator route, RIDDOR link, responsible person and record location. The broader incident article is Reporting Legionnaires disease: RIDDOR, public health and incident escalation.
Sources
- UKHSA, “Notifiable diseases and how to report them”. https://www.gov.uk/guidance/notifiable-diseases-and-how-to-report-them
- Public Health Wales, “AWARe and notifiable disease”. https://phw.nhs.wales/topic/aware-and-notifiable-disease/
- legislation.gov.uk, “The Health Protection (Notification) (Wales) Regulations 2010”. https://www.legislation.gov.uk/wsi/2010/1546
- Public Health Scotland, “Guidance for the public health management of Legionnaires’ disease: notification and reporting”. https://publichealthscotland.scot/publications/guidance-for-the-public-health-management-of-legionnaires-disease/guidance-for-the-public-health-management-of-legionnaires-disease-version-2/notification-and-reporting/
- Public Health Agency Northern Ireland, “Legionellosis: Northern Ireland surveillance report 2014 to 2024”. https://www.publichealth.hscni.net/publications/legionellosis-northern-ireland-surveillance-report-2014-2024
- HSE, “RIDDOR, Reporting of Injuries, Diseases and Dangerous Occurrences Regulations”. https://www.hse.gov.uk/riddor/
- HSE, “Other duties: RIDDOR and notification of cooling towers or evaporative condensers”. https://www.hse.gov.uk/legionnaires/what-you-must-do/duties.htm