● Built for Utilities Operators. ● Ofgem & HSE Aligned. ● ISO 27001 Data Centre.

When something
goes wrong,
move fast.

Reach every engineer, operator and manager instantly across SMS, voice, and mobile app. Know in real time who is safe, who has responded, and who still needs to be contacted — with a full audit trail and instant access to your incident response and continuity documents.

2,400 Messages per minute
99.9% Uptime guaranteed
<8s Average delivery time
Northgate Water Services  ·  14 May 2026  ·  03:14 Live
📱
SMS — All Field Engineers (67)
Network incident — activate emergency response now
Delivered
📞
Voice call — On-call Directors (4)
Priority escalation — Ofgem notification triggered
Confirmed
🔔
App push — Remote & lone workers (24)
Working on network — confirm safe and stand by
Delivered
Staff Responses 54 of 67
🔒

Full audit trail logged automatically. Every message, timestamp, response and document access recorded for Ofgem and HSE reporting.

Instant network-wide alerts icon
Utilities & Infrastructure • Field Engineers, Control Rooms & Operations

Reach field teams, control rooms and contractors in seconds

One click sends an alert to everyone with acknowledgements you can evidence. Use push by default, and fall back to SMS or voice for those not on the app — so you always reach your full workforce, on-site, in the field or working remotely.

  • Network incidents, asset failures and RIDDOR-notifiable events
  • Lone worker and remote field engineer safety check-ins
  • Urgent Ofgem, HSE or regulatory alerts to all staff and contractors
Field engineer alert on mobile app
Utilities admin console for alerts and operational groups
Setup and tools icon
Set up in under an hour • No IT department needed

Easy to run. No training burden.

Create messages, pick groups (Control Room, Field Engineers, On-call Directors, Contractors), and dispatch in a few clicks. Import contacts from your workforce management system or HR export and manage access by role, depot or region.

  • CSV and workforce management system friendly roll-out
  • Role-based access for depots, regions and contractor teams
  • Full message and document access logs for Ofgem and HSE audit readiness
Reliability and resilience icon
Resilience built in • Multi-channel delivery

Stay connected — even when the network fails

Cloud-hosted and continuity-ready. If your SCADA systems, internal comms or network access go down, alerts still reach engineers and operations teams via app, SMS or voice — and your incident response documents remain accessible from any device, on any site.

  • Operates during network, SCADA or internal comms outages
  • App, SMS and voice redundancy for field and remote teams
  • Live acknowledgements, document access tracking and audit trail
Multi-channel notification visual
How it works

Operational in a day.
Resilient for years.

No IT team. No long project. Just six steps from sign-up to fully prepared.

Book a free demo →
Setup

Your branded console, built for you

We create your private admin console — branded and pre-configured for utilities operations before you even log in.

⏱ We handle this
1
2
Setup

Assign your administrators

Decide who holds access — by role, depot or region — with full control over permissions from day one. Typically your control room manager or emergency planning lead.

⏱ Minutes
Setup

Upload your people and incident response documents

Import staff and contractors from Excel, CSV or workforce management exports. Upload your incident response plans, on-call rotas, emergency contacts and key procedures — all accessible from the app at any incident site.

⏱ Under an hour
3
4
Live

You're up and running

Console live. People loaded. Documents published. Most utilities operators reach this point within 24 hours.

✓ You're live
Maturity

Test, drill, build confidence

Run a live network incident drill. Confirm delivery rates across field teams and document access. The best time to test your incident response plan is before an event forces you to.

⏱ Ongoing
5
6
Maturity

Build your message library

Pre-approve messages for every scenario — network failures, asset incidents, contractor mobilisation, regulatory notifications, lone worker check-ins. Written when heads are clear — ready when they're not.

⏱ Ongoing
Setup — day one
Live — you're operational
Maturity — resilience building




Clear, predictable pricing for utilities operators

We charge per user, so you only pay for the people you need to reach — staff and contractors alike. Each licence includes generous allowances for push, SMS and voice — enough for network incidents, regulatory alerts and lone worker check-ins without worrying about unexpected costs.
  • Simple per-user pricing — no hidden extras
  • Ample message allowances built in
  • No "per alert" charges or surprise invoices

Frequently Asked Questions

What is required to get up and running?

We create your private administration console, seeded with sample data for utilities operations. You'll receive logins for the admin site and time-limited app registration codes. From there, you can upload your staff and contractor list, publish your incident response documents and roll out to a pilot group. Most operators are ready to test in under an hour.

Where is our data stored?

Your data is hosted in a Tier 3+ carbon-neutral European data centre in Germany. With ISO 9001, 14001 and 27001 certifications, N+1 power, generators and UPS, we deliver enterprise-grade security and uptime — fully UK GDPR compliant as standard.

How much does it cost?

We charge per person, so you only pay for the people you need to reach — whether staff or regular contractors. Each licence includes generous allowances for push, SMS and voice messaging. No hidden extras, no per-alert billing, and straightforward for finance teams and procurement to sign off.

See what it costs

What number do messages come from?

In most countries we can provide a dedicated number for SMS and voice. Field engineers can reply, and responses are logged in your console. If replies aren't needed, SMS can be sent from a branded text ID instead — useful for large contractor or field engineer pools.

What if we run out of messages?

Every licence includes a generous allowance sized for normal utilities operations — network incidents, regulatory notifications, asset failures, lone worker check-ins and contractor mobilisations. If you ever approach the limit, we'll notify you well in advance and you can top up at low cost. Most operators never need to.

Can we include contractors and third-party engineers?

Yes — you can add contractors to your console alongside permanent staff, with appropriate access restrictions. Disable access the moment a contract ends. This ensures your full working workforce can be reached in an incident, without compromising access to sensitive documents.

What languages can we use?

SMS can be sent in any language supported by your keyboard. Voice messages are available in most languages, with male/female voices and regional English accents — useful for diverse field workforces operating across different regions.

Is there a minimum contract?

We offer annual licences for budget predictability, which suits most utilities procurement and operational planning cycles. Multi-year discounts are available. Charitable or community energy organisations can request special pricing.

Faster Response. Safer Field Teams. Greater Regulatory Confidence.

When the unexpected happens — a network failure at 3am or a RIDDOR-notifiable incident on-site — you need every engineer informed, documents accessible, and responses evidenced within minutes. The Calling Tree delivers instant alerts with tracked confirmations and document access you can demonstrate to Ofgem, the HSE and your board.

See it in action15-minute walkthrough for operations managers & safety leads Talk to usAsk about pricing, setup and organisation-wide rollout PricingBuilt for utilities operators of all sizes

Not ready for a demo?

We'll send a short pack showing how utilities operators use The Calling Tree for network incidents, lone worker safety and regulatory compliance — including a setup checklist, example alert templates and a sample network incident communication policy.

Get the info packTemplates, checklist and sample network incident communication policy
Hands-on onboarding and support for utilities operators

Partnered onboardingUp and running in under an hour

We help you import staff and contractors, create groups for control room, field engineers, on-call directors and regional teams, upload your incident response documents, and send your first alert. Zero IT time, clear guidance, and real people who actually pick up the phone.

Simple mobile app for field engineers and operators

Simple for everyoneRight information, right people

Control room operators, field engineers and contractors see only what they need — alerts, incident response documents and key contacts. Push by default, SMS or voice for those not on the app, so you always reach everyone regardless of location or shift.

Secure document and contact access for utilities operators

Regulatory-ready audit trailEvidenced responses & role-based access

Role-based access means no personal numbers shared, incident response documents secured by permission, and full traceability for every alert and document access event. Produce evidence for Ofgem reviews, HSE investigations and internal governance in minutes, not hours.

Fully branded administration console

Manage staff, contractors, incident response documents, depot contacts, escalation call trees and alerts from one secure dashboard — with live delivery, document access and acknowledgement tracking for every message sent.
The Calling Tree utilities administration console

You stay in control

Assign permissions by role, depot or region, restrict access to sensitive incident response documents, and export a complete audit trail for Ofgem compliance, HSE reporting or internal governance.

App roll-outFast and fuss-free

Staff and contractors receive a time-limited registration code with direct links to the app stores. Install, enter the code, and they're in. Works seamlessly with your MDM for managed distribution — or as a simple BYOD roll-out for field teams and contractors.

Quick app roll-out to field engineers and operators

Leavers, joiners & contract endInstant lock-out / activation

Disable access the moment someone leaves or a contract ends — including access to sensitive incident documents. New staff and contractors are added from your workforce management export. Maintain data security with minimal admin overhead.


Instant access control for leavers and contract end

Lone worker & field safety"Are you safe?" with proof

Send safety check-ins by SMS or voice and track acknowledgements in real time. Engineers can reply by SMS, press a key on a call, submit a web response or check in on the app — giving you a verifiable HSE-ready record of who is safe, reachable and has accessed their incident documents.

Track lone worker and field engineer safety check-ins


Call us on +44 0800 852 7764 or email info@thecallingtree.com — ask for the Utilities information pack and a 15-minute walkthrough.

Schedule your free trial today

Fully functional, access ALL app features trial. Our support team create your private admin console, assist in on-boarding your test data and incident response documents, and are available 24x7 to assist — so you can feel the power of the platform first hand.

I want to try for myself!Create my private trial area today
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