BT Group plc is the United Kingdom's largest provider of fixed-line, broadband and mobile telecommunications services; it operates through three customer-facing divisions including Consumer, which offers BT Broadband, EE Broadband, EE Mobile, EE TV, EE WiFi, Plusnet fixed and mobile services and TNT Sports; Business, which delivers connectivity, networking, cyber security, collaboration tools, cloud connectivity, cloud services, fixed and IP voice, unified communications, security and IoT solutions as well as managed services to small, medium and large corporates, public sector and government customers in the UK and internationally; and Openreach, which builds, owns and operates fixed and mobile networks providing wholesale access primarily in the UK. Founded with origins tracing to 1846 and headquartered at One Braham in London, England, the company serves over 30 million customers principally in the UK with operations spanning approximately 180 countries and generated £20.4 billion in revenue for the year to March 2025. Recent developments include Bharti Enterprises acquiring a approximately 24.5% stake from Altice UK in August 2024 to strengthen strategic ties in telecoms, AI and 5G R&D; increased capital spending announced in May 2025 to accelerate Openreach's full-fibre rollout targeting up to five million premises passed in the year to March 2026 and 25 million by end-2026; agreement in December 2024 for Equinix to acquire its Irish datacentre business for €59 million expected to complete in the first half of 2025; and inauguration of a new Welsh headquarters hub in Cardiff in March 2024.