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Free White Paper
The XL Groups Challenge
Why "near-instant" push-to-talk for very large groups is one of the hardest parts of migrating to broadband MCX — and the seven questions every buyer should ask. A vendor-neutral briefing drawn from 25+ years on national programmes.
Briefing Paper · ESN
Emergency Services Network: the July 2026 Summary Business Case
By Andrew Fleet · Critical Insights Ltd · 11 August 2026
On 4 August 2026 the Home Office published a Summary Business Case for the Emergency Services Network, dated 27 July 2026. It is the first substantial new public ESN document since the programme's BAPCO update, and it carries the numbers that will be quoted at chief officer teams for the next two years.
We have read it and written down what it says, what it commits to, and — the question most people are actually asking — whether the preferred option has been decided and whether any new contract has been agreed.
What the paper concludes
The document recommends its preferred option for approval rather than recording that approval has been given, and we found no announcement of a decision and no new contract award tied to it — the commercial arrangements it relies on were already in place. Approval is probable, and the paper says so and explains why, but the distinction matters to anyone building a transition plan on it.
It is four pages, sourced entirely to published material, and written for transition leads, finance and commercial officers rather than for engineers. It is free and ungated — no form, no email address.
Migration
Migration is a change programme, not a technology swap
By Andrew Fleet · Critical Insights Ltd
Every organisation moving from TETRA to mission-critical broadband eventually learns the same lesson: the radios were never the hard part.
The hard part is the operating model around them — the control-room workflows, the talkgroup structures, the fleet-mapping, the training, and the quiet confidence a firefighter has that the button will work when they press it. A network can be technically live and still fail its users if that surrounding capability hasn't moved with it.
Why it matters
Treat an MCX migration as a technology procurement and you'll deliver a network. Treat it as a change programme and you'll deliver a capability people actually trust. The difference shows up not on go-live day, but on the first bad night when the system is under real pressure.
The organisations that migrate well aren't the ones with the biggest budgets — they're the ones that treated the human and operational change as seriously as the technology, and started early. That distinction is where most of the risk, and most of the value, sits.
Planning your transition? Independent migration and readiness support is a core part of what we do — get in touch.
Readiness
The most expensive word in a migration is "later"
By Andrew Fleet · Critical Insights Ltd
The single most common mistake we see user organisations make preparing for MCX is leaving the hard questions until "later" — until the network is nearly ready and the room for manoeuvre has gone.
Four questions in particular reward being asked early:
Coverage parity
Will the new network reach the places TETRA reached and cellular typically doesn't — the tunnels, the valleys, the basements, the rural edge? Coverage is the promise frontline users judge everything else against.
Device and accessory readiness
Does the device and its push-to-talk accessory work with a gloved hand, in the wet, through a full shift? Mission-critical broadband lives or dies on that last thirty centimetres.
Resilience and fallback
What happens on the day the commercial network has a bad day? Graceful degradation and a credible fallback are not optional extras in a life-safety service.
Group-call performance
Do group calls set up in the milliseconds an incident demands, at the busiest cell, on the worst night of the year? The demo always works; the incident ground is the real test.
Left late, each of these becomes a crisis. Addressed early, each is just a work-stream. Talk to us about a readiness review before the network is built.