The network behind the UK’s essential services
BT is a cornerstone of the UK’s Critical National Infrastructure. From 999 call handling and defence networks to energy and transport systems, we provide the secure foundations that the UK depends on most.
Backed by decades of sustained investment, leading cyber capabilities and resilience at scale, BT is trusted to support the country’s most critical operations.
Stronger continuity Maintain access during high demand, supporting consistent responseClearer control Improve visibility and access, supporting more effective coordinationGreater confidence Support consistent performance, reducing risk to service delivery and decisions
Why BT for Critical Communications
Connectivity at national scale
BT operates networks that support large-scale, high-demand environments across the UK.
Grounded in real operational experience
BT supports communications in complex operational environments, bringing practical understanding of real-world use.
Designed to work with existing systems and workflows
Connectivity and services work with existing devices, applications and environments, supporting operations without requiring fundamental change.
A joined-up communications portfolio
Connectivity and services are designed to work together across MissionNet, helping reduce fragmentation across communications.
Clear service design and behaviour
Defined service characteristics help organisations understand how communications operate in practice.