UK Telecoms Group Delivering Managed Cyber Security and Network Defence at Scale

BT Group is a British telecommunications operator with close to 180 years of history, reporting GBP 19.7 billion in revenue for the year ending March 2026 and serving nearly 31 million retail consumer and business connections in the UK and internationally. Alongside broadband, mobile and network infrastructure delivered through brands including EE, Openreach and BT Wholesale, the group runs a substantial cyber security practice aimed at large enterprises, public sector organisations and other communications providers.

The security portfolio is structured around managed controls and threat management rather than a single product. Managed firewall, cloud security and DDoS mitigation sit at the network layer, while managed SIEM, EDR and XDR services extend detection across endpoints, cloud and email. Analysts handle round-the-clock monitoring, triage, investigation and response on the customer's behalf, tuning detection rules to each environment and working from established playbooks, with vulnerability scanning and threat intelligence available as add-on integrations.

Scale and network position underpin the proposition: roughly 3,000 security professionals globally, technology developed first to defend the operator's own infrastructure, and integration work spanning partnerships with vendors including Microsoft and CrowdStrike. IDC MarketScape has named the group a leader in managed security services. Coverage reaches beyond conventional IT into surveillance cameras and control rooms, zero-trust mobile device protection, security consulting and drone detection, reflecting a provider that also defends national-scale infrastructure.