A hospital is the one site where the contractor's own permit system stops at the hoarding. The systems belong to the organisation, which controls them through people it has appointed in writing: an Authorised Person for each engineering discipline, a Quality Controller for medical gases, an infection prevention and control team, a fire safety adviser, and the matron whose ward it is. A contractor who arrives with their own permits and no idea who these people are will be stopped on day one.
The model behind every discipline
HTM 00, Policies and principles of healthcare engineering, runs every discipline on four roles. A Designated Person at board level makes the appointments and receives the audit. An Authorising Engineer, independent of the organisation, assesses and recommends. An Authorised Person is appointed in writing to control the system and issue its permits. Competent Persons work under that Authorised Person's control. HTM 06-02 applies the model to low-voltage electrical, HTM 02-01 to medical gases, HTM 03-01 to ventilation and HTM 04-01 to water; Scotland, Wales and Northern Ireland publish their own SHTM and WHTM equivalents on the same model.
So a contractor's electrician does not isolate a hospital distribution board: the estates Authorised Person does, and issues the permit the contractor's Competent Person accepts.
The five system controls
Electrical. The estates low-voltage permit covers work on equipment made dead. Work merely near live equipment takes the limitation of access certificate: presence within a boundary, never work on the equipment. Testing on a live or partly live system takes a Sanction-for-Test.
Medical gases. HTM 02-01 Part B is a permit-to-work system. The Designated Medical or Nursing Officer signs, before any valve is closed, that the area can lose the supply and has cylinders in hand; the Quality Controller verifies the gas at every terminal unit affected, where the gas requires it, before it returns to a patient.
Ventilation. Theatres, isolation rooms and aseptic suites are critical systems under HTM 03-01: the Authorised Person (Ventilation) isolates them with the department's written agreement and returns them only when the pressure regime and air changes match the validation record.
Water. The Water Safety Group authorises any work that opens the domestic water system, under HTM 04-01 Parts B and C and the legionella regime in ACOP L8 and HSG274 Part 2: no dead legs, flushing to the written scheme, sampling where the group asks.
Fire. A hospital does not evacuate to the outside as its first response. Under HTM 05-02, Firecode, patients move through a compartment wall into the next compartment, and further only if the fire demands it, so the fire safety adviser (HTM 05-01) wants to know what the works do to compartmentation, fire doors, escape routes and detection before anything starts. Detector isolations run under HTM 05-03 and BS 5839-1.
Infection control
Building work makes dust; dust carries fungal spores; some patients cannot fight them. The infection prevention and control team uses the method in HBN 00-09: the type of work is crossed against the vulnerability of the patients around it, and the crossing gives a class of precautions: sealed hoarding, negative pressure with HEPA-filtered exhaust, agreed routes, wet cleaning. The class comes from the organisation's own matrix, not from a template, and the IPC nurse signs the permit.
What the law actually requires
The HTMs are NHS England guidance; they bind a contractor through the contract and the organisation's policies, not directly. The law behind them is general: section 3 of the Health and Safety at Work etc. Act 1974, the duty to people who are not your employees. CDM 2015 regulation 13 puts the principal contractor in charge of managing the works around the people affected. The Electricity at Work Regulations 1989 require means of isolation (regulation 12), precautions for work on equipment made dead (regulation 13) and competence (regulation 16). Article 9 of the Regulatory Reform (Fire Safety) Order 2005 puts the fire risk assessment under review at any significant change, and works in an occupied building are one.
The handback
A ward is handed back once, on a certificate that indexes every record above, closed, and carries four signatures: estates, infection control, fire, and the matron who accepts the area back into clinical use.
What a template does not do
A template gives both sides the same headings and the same sequence of signatures. It does not appoint anyone, and a permit signed by someone the organisation has not appointed is a piece of paper. A competent person adapts these documents to the organisation's own safety rules and validation records, and no document makes anyone compliant. Why we will never call a document "compliant".
Documents for this work
- The healthcare estates bundle — all eight documents
- Authorised Person and Competent Person Appointment Record
- LV Permit to Work and Limitation of Access Certificate
- Medical Gas Pipeline Systems Permit to Work
- Critical Ventilation Isolation and Reinstatement Record
- Water Systems Work Authorisation and Flushing Record
- Infection Control Risk Assessment and Permit
- Fire Safety Impact Assessment — Occupied Healthcare Building
- Ward and Department Handback Certificate
- Fire Alarm and Detection Isolation Permit — the isolation permit issued against the fire safety assessment
- Medical Gases — Pipework, Pressure, Purity and AP Witness (HTM 02-01) — the test record behind the medical gas permit