A clear plan for who does what, when and how, and a team to keep it running. Structured compliance schemes and monitoring programmes that make your duty straightforward.
20 years
Isaac's Legionella experience
HSE ACoP L8
compliant assessments
Gas Safe
registered
£5m
public liability cover
Service overview
A written scheme of control is the document that turns your risk assessment into a practical plan. It describes your water system, sets out the control measures, lists every check with its frequency, names who is responsible, and explains what to do if results go wrong. Ongoing management is the work of keeping that scheme running and up to date.
Written schemes are needed where the risk assessment shows a reasonably foreseeable risk. That covers most commercial buildings, including healthcare, schools, golf clubs and offices, and some larger residential portfolios.
A scheme should be put in place once a risk assessment is complete, and reviewed whenever the assessment, the building, or the people responsible change.
A scheme is only useful if people can follow it. We write clear, structured schemes and can run the ongoing monitoring programme ourselves, drawing on 20 years of Legionella control experience. Our approach follows HSE ACoP L8 guidelines.
The risk
Without a written scheme, control depends on memory and goodwill. Tasks get missed, responsibilities become unclear, and when staff change, knowledge leaves with them.
Inspectors expect to see a written scheme where there is a foreseeable risk. Missing or unclear schemes make it hard to prove control and can lead to enforcement action. Gaps in control also leave occupants exposed.
Service requirements
The scope, schedule, checks and any reporting or handover requirements are agreed for your property at quote stage.
We start from your current risk assessment, or carry one out.
We document the system, control measures, checks and responsibilities.
Handover arrangements and responsibilities are agreed as part of the service.
Our team can carry out the ongoing monitoring and checks.
Review and update arrangements are agreed as part of the service.
Benefits
Everyone knows what they are responsible for.
Every check has a frequency and an owner.
Documented responsibilities can support continuity when staff change.
A clear, current scheme to show inspectors.
We can run the programme and keep records for you.
A plan for what to do when results go wrong.
In detail
Every scheme is built around your building and your people.
Covering Water hygiene in Luton, Water hygiene in St Albans, Water hygiene in Dunstable, Water hygiene in Harpenden, Water hygiene in Hemel Hempstead, Water hygiene in Milton Keynes, Water hygiene in Bedfordshire, Water hygiene in Hertfordshire, Water hygiene in Buckinghamshire, Water hygiene in Northamptonshire, Water hygiene in Cambridgeshire and nationwide.
An up-to-date description of the water system, including storage, water heaters, distribution and outlets, so anyone can understand how it works.
The specific measures that control the risk, such as temperature control and flushing, and the checks needed, with frequencies and acceptable limits.
Who is the responsible person, who deputises, and who carries out each task, whether in-house staff or our team.
What happens when a check shows a problem: who is told, what action is taken and how it is recorded.
We can carry out monitoring, temperature checks, inspections and reviews as an ongoing service, so the scheme is followed in practice.
Guide
HSE's ACoP L8 expects duty holders to have a written scheme for preventing or controlling the risk where one has been identified. The scheme should be specific and detailed enough to put into practice. It should explain the system, the control methods, the checks to be carried out, how often, by whom, and what to do if things go wrong.
A scheme is not something you write once and file. It needs to be reviewed when the risk assessment changes, when the system is altered, or when results suggest control is not working. It also needs to be followed, which means the people named in it must know what they are responsible for and have the time to do it.
A written scheme may be well prepared but ineffective if it is not put into practice or maintained. Ongoing management solves this. We carry out the scheduled checks, keep the records, review results and update the scheme so it stays accurate.
This works particularly well for organisations without a dedicated estates team, such as schools, golf clubs and smaller office buildings, and for landlords with several properties. You keep oversight and responsibility, while we carry out the detailed work.
Clear records are a key part of ongoing management. Records of monitoring, inspections, remedial work and reviews should be kept so you can show inspectors, insurers and auditors that your scheme is in place and working.
Whether you are in Hertfordshire, Bedfordshire, Buckinghamshire or further afield, we can review your current documents and give you a clear plan for bringing your scheme up to date.
Healthcare facilities need detailed schemes that reflect higher temperature targets, more frequent checks, and clear escalation routes when results are outside limits. Responsibilities across estates, clinical and management teams must be clearly defined.
Schools need schemes that cover term time and holidays, with named staff for day-to-day tasks and clear instructions for caretakers and site managers. Governors and business managers need simple summaries to show the duty is being met.
Golf clubs often rely on volunteers and part-time staff. A clear, simple scheme, with us carrying out the technical checks, removes the burden from committee members to support the club's Legionella management.
Office buildings and landlords need schemes that cover shared areas, plant rooms and individual units, with clear lines of responsibility between landlord and tenant where relevant.
Wherever you are, the scheme should be readable by the people who need to follow it. We avoid jargon, keep instructions practical, and make sure the scheme matches the building as it is today. Review and update arrangements are agreed as part of the service.
FAQs
8am – 8pm, Monday – Sunday
It depends on the size and complexity of your system. Initial site visits and Legionella quotes are free. We provide detailed quotations.
Yes. Initial site visits and Legionella quotes are free. We provide detailed quotations.
If your risk assessment identifies a reasonably foreseeable risk, a written scheme of control is expected. We'll advise based on your assessment.
Yes. We provide ongoing management, carrying out the monitoring and checks and keeping records.
Whenever the assessment, the system or the responsible people change, and as results show it needs adjusting.
Yes. We review your existing documents and records and take over ongoing management.
Yes, along with Buckinghamshire, Northamptonshire, Cambridgeshire, Milton Keynes and nationwide.
The risk assessment identifies the risks. The written scheme is the plan for controlling them: what is checked, how often, by whom, and what happens if results go wrong.
The person appointed to take day-to-day responsibility for managing Legionella control. The written scheme should name them and a deputy, and set out what they are responsible for.
We're available 8am to 8pm, seven days a week, which makes it easier to schedule work around your opening hours. Call 07398 411881.
Free site visit
Book your free site visit for written schemes & ongoing management. Initial site visits are free; the proposed work and terms are set out in a detailed quotation.
07398 411881isaac@imwhs.com · 8am – 8pm, Monday – Sunday
