Ofcom Investigates BT and Three for Mobile Network Outages

Ofcom, the UK's communications regulator, has initiated investigations into BT and Three concerning significant mobile network outages that occurred in July and June 2025, respectively. These incidents caused widespread disruption to mobile call services, impacting the ability of customers to reach emergency services. The investigations will determine if BT and Three failed to meet their regulatory obligations, which include taking appropriate measures to prevent and mitigate network compromises and reporting outages above certain thresholds.

Telecommunications firms operating in the UK must ensure the availability, performance, and functionality of their networks and services, including robust measures to prevent adverse effects and timely reporting of significant incidents. Companies found to be in breach of these obligations may face regulatory action. This development underscores the critical importance of network resilience and compliance with reporting requirements for all mobile operators, particularly concerning the integrity of emergency call services.