Sanctuary Housing: the £900,000 sheltered-housing legionella fine
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Key points
- £900,000 fine plus £11,480.60 costs for Sanctuary Housing Association in 2024, after every water sample at a Birkenhead sheltered-housing scheme tested positive for legionella in 2018.
- Nobody fell ill. The prosecution stood on the management failures alone: a poorly managed system, inadequately trained staff, and wrong advice given to vulnerable residents.
- Residents were wrongly told the water could be boiled and used — advice that does not address legionella, which is inhaled as spray rather than drunk.
- The case was brought by the HSE under HSWA 1974 section 3(1), the duty to protect people other than employees.
- The lesson for housing providers: positive samples demand a documented response, competent help, and correct resident communication — not improvisation.
Sanctuary Housing Association was fined £900,000 in 2024 after every water sample taken at one of its sheltered-housing schemes in Birkenhead tested positive for legionella. The system was poorly managed, staff were not properly trained, and elderly residents were wrongly told they could boil the water and carry on using it. Nobody contracted Legionnaires’ disease, and the fine was still close to a million pounds.
The case is one of the clearest illustrations of a principle that runs through UK legionella enforcement: the offence is the failure to manage the risk, not the illness that follows. It is recorded in our legionella enforcement tracker alongside the other prosecutions in the dataset.
What happened
In 2018, water sampling at a Sanctuary Housing sheltered-housing scheme in Birkenhead, in North West England, returned positive results for legionella across the board — every sample taken. Sheltered housing is exactly the setting where a positive result matters most, because the residents are older and more vulnerable to Legionnaires’ disease than the general population.
Rather than escalating the problem to competent water-hygiene specialists, the response on the ground was to tell residents the water could be boiled and used. That advice was wrong. Legionella causes illness when contaminated droplets are inhaled — from showers, spray taps and other aerosol-generating outlets — not when water is swallowed. Boiling addresses a drinking-water problem that legionella does not present, while leaving the real exposure route untouched.
The situation deteriorated to the point where vulnerable residents had to be evacuated from the scheme while the water system was dealt with. The HSE investigated and prosecuted. In 2024 the association pleaded guilty to breaching section 3(1) of the Health and Safety at Work etc. Act 1974 — the duty to conduct its undertaking so that people who are not employees, here the residents, are not exposed to risk.
The failings the inspectors found
The HSE’s findings grouped into three failures, each of which maps directly onto a duty that ACOP L8 and HSG274 set out:
- A poorly managed water system. The universal positive results were the symptom. Behind them sat a system without effective management: the routine controls that keep stored and distributed water outside the legionella growth range were not working.
- Inadequately trained staff. The people responsible for the system did not have the competence to run it or to respond correctly when sampling returned positive results. ACOP L8 expects those involved in controlling the risk to be competent for the role they hold.
- Wrong advice to residents. Telling elderly residents to boil water showed the people giving advice did not understand the hazard they were dealing with. In a sheltered scheme, that misunderstanding was itself part of the risk.
These are the same three threads — management, competence, and response — that appear across the fines and prosecutions record. What made Sanctuary unusual was the combination of a vulnerable population and a response that actively gave residents false reassurance.
The fine and costs
| Fine | £900,000 |
|---|---|
| Costs | £11,480.60 |
| Charge | Health and Safety at Work etc. Act 1974, section 3(1) |
| Prosecutor | Health and Safety Executive |
| Illness or death | None — residents were evacuated; nobody fell ill |
A £900,000 fine with no illness at all is the number that should stay with any housing provider. Under the sentencing guideline for health and safety offences, courts weigh culpability, the harm risked, and the organisation’s turnover. A large housing association exposing a scheme full of vulnerable residents to an unmanaged water system sits high on all three.
The lesson for duty holders
For anyone running housing — a housing association, a local authority, a landlord with rented stock — the case carries four practical lessons:
- A positive sample is a trigger, not a verdict. What turns a positive result into a prosecution is what happens next. Acting on it, with competent help, and recording each step is what the law expects. Our guide on sampling and action levels explains what the counts mean.
- Competence is not optional. The people managing the water system, and the people advising residents, need to understand the hazard. If they cannot explain why boiling water is the wrong answer, they should not be the ones answering.
- Never improvise resident advice. In a setting with vulnerable occupants, the wrong message is its own harm. Escalate to competent advice before telling residents anything.
- No illness is no defence. The absence of cases of disease did not reduce the fine to a nominal figure. The unmanaged risk was the offence.
Free legionella risk assessment template
A structured Word document following the five-step approach in ACOP L8. Covers risk identification, written scheme, monitoring, and records. If it isn't written down, you can't evidence it.
Follows ACoP L8 and HSG274 Part 2. Free. No spam.
Every sample at the scheme was positive, nobody fell ill, and the fine was still £900,000. The court punished the management failure, not the outcome — and telling vulnerable residents to boil the water showed how far the management had failed.
The starting point is the same for every housing provider: a current legionella risk assessment for each property’s water system, a named responsible person, routine temperature control checks recorded as they happen, and a written procedure for what to do when a sample comes back positive. The free risk assessment builder is an indicative starting point for structuring that assessment — it records and organises what you find; it never certifies a system as safe.
Source: HSE press bulletin on the Sanctuary Housing prosecution. Figures are recorded as published in our legionella enforcement tracker dataset; check the linked source before relying on any figure.
Free legionella risk assessment template
A structured Word document following the five-step approach in ACOP L8. Covers risk identification, written scheme, monitoring, and records. If it isn't written down, you can't evidence it.
Follows ACoP L8 and HSG274 Part 2. Free. No spam.
Frequently asked questions
Why was Sanctuary Housing fined £900,000 for legionella?
In 2018 every water sample taken at a Sanctuary Housing sheltered-housing scheme in Birkenhead tested positive for legionella. The HSE found the water system was poorly managed, staff were inadequately trained, and residents were wrongly told the water could be boiled and used. Vulnerable residents had to be evacuated, although nobody fell ill. The association pleaded guilty to breaching section 3(1) of the Health and Safety at Work etc. Act 1974 and was fined £900,000 plus £11,480.60 costs in 2024.
Can a landlord be fined for legionella even if nobody falls ill?
Yes. The offence under the Health and Safety at Work etc. Act 1974 is failing to manage a foreseeable risk, not causing illness. In the Sanctuary Housing case nobody contracted Legionnaires’ disease, yet the fine was £900,000 because the management failures were serious and the residents were vulnerable. The presence of bacteria and the absence of controls were enough.
Is boiling water a safe way to deal with legionella?
No. Legionnaires’ disease is caught by inhaling contaminated water droplets, not by drinking the water, so telling residents to boil water does not address the route of exposure. Boiling is a response associated with drinking-water contamination incidents. The correct response to positive legionella results is to follow the written scheme of control, restrict use of spray outlets where needed, and bring in competent help to disinfect or remediate the system.
What should a housing provider do when legionella samples come back positive?
Treat a positive result as a trigger to act, not to improvise. Check the count against the HSG274 action levels, review whether temperature control and flushing are actually happening at the affected outlets, disinfect or remediate the system where the level requires it, and resample to confirm the control worked. Record every step, including what residents were told, and make sure the advice given to residents is the correct public-health advice rather than a guess.
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