LON/Specific Roles/TBT-LON-012

Lone Night Watchman Safety

Lone Working › Specific Roles › Lone Night Watchman Safety

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Night watchmen protect construction sites from theft, trespass, vandalism, and fire during non-working hours.
They work alone at night, combining the risks of lone working, night working, and security duties.
A specific lone working risk assessment must cover the site, the building, and the patrol route.
Check-in procedures at regular intervals are essential — missed check-ins must trigger an escalation response.
Personal safety devices with GPS, fall detection, and panic alarms provide an additional safety net.
Violence and aggression from trespassers is a genuine risk that must be addressed in the risk assessment.
The patrol route must be assessed for trip hazards, poor lighting, and unprotected edges or openings.
A warm, secure welfare area must be available with lighting, heating, and communication equipment.
Medical emergencies while alone at night can become life-threatening without rapid assistance.
Fire detection and alarm systems should be operational to alert the watchman to fire on site.

Isolation	A lone night watchman who is injured, trapped, or confronted has no immediate colleague to provide help.
Security confrontation	Encountering intruders at night on a dark construction site carries a real risk of violence.
Medical emergency	A medical event such as a heart attack while alone at night is fatal without rapid detection and response.

Don't

Complete a lone working risk assessment specific to the site and night patrol role
Carry a personal safety device with GPS, panic alarm, and fall detection features
Follow the agreed check-in schedule without exception throughout the shift
Carry a charged mobile phone and torch with spare batteries at all times
Know the emergency contacts and procedures for police, ambulance, and fire response
Patrol the route identified in the risk assessment — avoid unlit and unsafe areas
Report signs of trespass, forced entry, or suspicious activity to the control room
Avoid confronting intruders directly — withdraw to a safe location and call for assistance
Ensure the welfare area is warm, secure, and equipped with communication facilities
Test the fire detection system at the start of each shift to confirm it is operational

DON'T skip check-ins — they are your lifeline and trigger the escalation procedure
DON'T confront trespassers or suspected thieves — your safety comes first
DON'T patrol in unlit areas without a working torch and charged backup
DON'T leave the secure welfare area propped open or unsecured during your shift
DON'T sleep on duty — fatigue management should ensure you are fit for the shift
DON'T carry weapons or items that could escalate a confrontation with intruders
DON'T patrol near unprotected edges, open excavations, or voids in darkness
DON'T assume the site is safe because it was secure at the start of the shift
DON'T disable or ignore the personal safety device to avoid false alarms
DON'T accept the role without training on lone working, conflict avoidance, and first aid

See also: Lone Working Awareness | Security and Personal Safety at Night

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