Lone Worker Apps for Security Guards: UK Guide
Published 19 October 2026
What to look for in a lone worker app for security officers: check-ins, escalation, duress codes, monitoring and the legal duties behind it.
Many security officers work alone: night guards on a quiet site, mobile patrol officers, concierge staff on late shifts. Employers have a legal duty to keep them safe, and a lone worker app is one of the tools that helps. Not every app does the same job, so it is worth knowing what to ask for.
The legal duty
Employers must assess and manage the risks to their staff under health and safety law, and that includes the risks of working alone. The Health and Safety Executive explains what is expected in its guidance Protecting lone workers and on its lone working pages. The key idea is a risk assessment for the work, with controls that are proportionate. An app is a control. It does not replace the assessment.
What a lone worker system should do
- Regular check-ins. The officer is prompted at set intervals and confirms they are safe.
- A clear escalation path. If a check-in is missed, someone is told, then someone else, in a defined order and time.
- A way to raise the alarm. An "I need help" button the officer can press.
- A duress option. A covert code that looks like a normal check-in but raises the alarm, for when the officer is being watched.
- Location. Enough location information to send help to the right site.
- A record. A time stamped log of prompts, responses and who was told, for review and for evidence.
- Works at the post. It must cope with poor signal and not drain the phone.
Monitoring centres and the standard
Some lone worker services are staffed by a monitoring centre that responds to alerts around the clock. The British Standard for these services is BS 8484, which covers the provision of lone worker device services. If you need an accredited, externally monitored service, ask the provider whether they are certified to it and what they commit to in response times.
Other tools monitor within your own company: alerts go to your managers, who respond. That can be perfectly appropriate for a security company with a control room or on-call managers, as long as someone is always available and the escalation is tested.
Questions to ask any provider
- Who receives the alert at 3am, and what happens if they do not respond?
- How is a missed check-in different from an unanswered phone call?
- Can the officer raise the alarm silently?
- What is recorded, and for how long?
- Does it work for officers on a site with no signal at the gate?
- Who is responsible if the alert is missed: you or the provider?
How GuardFlow handles welfare checks
GuardFlow's lone worker welfare checks are set per site. The officer is prompted in the officer app, then a text and an email are sent, then an automated phone call (press 9 for help), then the company's managers are alerted, then the emergency step. There is a covert duress PIN and an "I need help" button. Alerts go to your own managers: GuardFlow is not a monitoring centre, and you should plan who answers each step. Every prompt and response is time stamped and recorded. See features, the mobile patrols page and pricing.