Method 01
Wired call points
Discreet, vandal-resistant wall units placed at strategic locations across every zone.
NewSentinel & Martyn's Law, what changes in 2026When seconds matter,
When seconds matter,
Sentinel responds.
A calm, building-wide lockdown alert system for schools, hospitals and public venues, designed to support the lockdown, invacuation and communication procedures expected under Martyn's Law.
- <2s
- From press to alert
- 200+
- Capacity threshold met
- 24/7
- Always-on Hub
Sentinel Hub · Online
North WingAll Clear
All zones reporting normal status
Trusted by UK education trusts Healthcare & NHS estates Local authority venues Built in the United Kingdom ISO-aligned installation
Live system · interactive
The Sentinel system. One press, every response.
Triggers feed the Sentinel Hub. The Hub orchestrates voice, sirens, strobes, door control, on-screen alerts and your Alarm Receiving Centre, in the right order, every time.
How a lockdown flows through Sentinel
Triggers feed the Hub · the Hub orchestrates every response
Tap any part to learn more
TRIGGERS
RESPONSES
THE CORE
Sentinel Hub
The brain of the system. Every trigger feeds into the Hub, which instantly coordinates the entire response, voice, sirens, strobes, doors, screens and outside help, in the right order, every time.
Martyn's Law · Protect Duty
Built for the procedures the SIA expects you to have.
The Terrorism (Protection of Premises) Act 2025, Martyn's Law , asks qualifying premises with a capacity of 200 to 799 to put sensible public protection procedures in place. Education settings and healthcare premises are named in Schedule 1.
Sentinel doesn't replace your procedures, it makes them performable. One press, and your lockdown, invacuation or evacuation plan runs across every room.
Talk to us about your premisesLockdown
Secure people in place with one action across every zone.
Invacuation
Move people inwards to safer areas when leaving isn't safe.
Evacuation
Trigger calm, directed evacuation through your existing PA.
Communication
Pre-recorded, multilingual instructions for staff and visitors.
Explainer
See Sentinel in action
Watch how a single press travels through the Sentinel Hub to lock down an entire building, and stand it back down, in under two seconds.
HD · 90s
0:00
1:30
Three ways to activate
One press. Whole-building response.
Staff can trigger Sentinel from anywhere, at a wall, in their pocket, or from their phone. Every method speaks to the same Sentinel Hub.
Method 02
Wireless panic button
Pocket-sized fobs for headteachers, ward managers and front-of-house staff.
Method 03
Sentinel mobile app
Authorised personnel can start or stand down a lockdown securely from iPhone, anywhere on site.
Why Sentinel
Other systems make a noise.
Sentinel runs a procedure.
Most lockdown solutions on the market are repurposed fire alarms or untested phone apps. Sentinel was built for this job, from the Hub up.
Designed for under-two-second response
From any activation point to whole-building announcement, without the lag of a software-only solution.
Calm, not chaotic
Many systems just make noise. Sentinel speaks, with the same wording every time, so people know what to do.
Works with the building you already have
Integrates with your existing PA, access control and ARC. You're not ripping anything out.
Built for the people inside, not just the alarm panel
Multilingual voice, strobes for hearing-impaired users, accessible controls. Inclusive by default.
Built for the places that matter most
Who we protect
Education
Schools, colleges & universities
Named in Schedule 1 of Martyn's Law. Sentinel scales from a primary classroom to a multi-building campus.
Healthcare
Hospitals & clinics
Designed for the unique demands of healthcare estates where calm, precise communication saves lives.
Local authority & publicly accessible buildings
Town halls, leisure centres, libraries, museums, any publicly accessible premises that needs a credible lockdown procedure under Martyn's Law. Talk to us about scoping.
From a Sentinel customer
"We've drilled fire procedures for decades. Sentinel finally gave our staff something to drill for lockdown, and the confidence that the building would actually respond when they pressed it."
SM
Sarah Matthews
Estates Director, multi-academy trust
Ready when you are
Let's lock down with confidence.
Book a no-obligation conversation with the Sentinel team. We'll walk your building, map the zones and design a system that fits, and your Martyn's Law procedures.
- 20-minute online walkthrough
- Site survey at your premises
- Procedure-fit review with your safeguarding lead
- Voice Doors ARCAll in one Hub