Mesh + Resilient Local Communications
Understand what mesh networking can and cannot do, where PMR446 fits, and how to plan household or community communications without claiming a network can do more than it can.
Mesh connectivity ≠ internet access ≠ emergency-service communication
A mesh is a network in which nodes can connect through one another rather than every device depending on a single central access point. That can improve local reach or provide alternate paths between participants. It does not create internet connectivity unless at least one node has a working internet gateway, and it does not create a route to 999/112 unless the technology/service explicitly provides one.
Wi‑Fi mesh
Consumer Wi‑Fi mesh systems use multiple access points to extend one local network. They are useful for coverage around a building, but most still depend on power at each node and often on a single router/gateway for internet. During a broadband outage the local Wi‑Fi may remain useful; during a power outage unpowered mesh nodes disappear.
Device-to-device and Bluetooth concepts
Some applications can exchange data directly over Bluetooth or local Wi‑Fi. The benefit is that nearby devices may communicate without a mobile network. The limitations are range, platform compatibility, battery use, app availability and whether the app secretly depends on an online account or server for setup. Test the exact application in airplane mode before relying on it.
LoRa-style low-bandwidth networks
LoRa and similar long-range low-data-rate radio technologies are useful for small messages and sensors, not broadband. Range depends heavily on frequency, antenna height, terrain, buildings and legal power limits. Some popular “mesh” projects use licence-exempt spectrum; others may have regional settings or equipment requirements. Use the UK-legal configuration and do not assume a product sold online is legal to transmit as configured.
PMR446 in the UK
Ofcom describes compliant PMR446 as a mobile, short-range, simplex, peer-to-peer service operating in 446.0–446.2 MHz, with compliant use licence-exempt and limited to low power (0.5 W ERP maximum). Use purpose-built compliant PMR446 handhelds as supplied. Range claims on packaging are best-case marketing; buildings, terrain and other users can reduce practical range substantially.
Amateur radio
Amateur radio can support technically capable local and long-distance communication, but transmitting generally requires an appropriate UK amateur radio licence and compliance with its conditions. It is a training and community pathway, not an excuse to transmit unlawfully during ordinary disruption. If it interests you, learn and license before you need it.
Community plan beats gadget collection
Agree who checks whom, what time windows to listen, which channel or local page to use, what happens if radio fails, and where people meet if no electronic path works. Use short, plain messages and avoid sharing sensitive personal details over open or shared radio channels. A communications plan should degrade gracefully from internet → mobile/SMS → local network/radio → paper/physical contact.
Verify / learn
These references are resolved from GPN’s central source registry so authority, coverage and source changes can be managed in one place. If a current official source conflicts with this guide, follow the current official source.
Editorial review date: 30 September 2026. Next scheduled review: 28 January 2027.