Our Networks unit runs BT’s fixed and mobile networks – connecting customers seamlessly and safely, wherever they are.

The UK's best network

Largest fixed & best mobile

Connect 200+ million devices & 30+ million customers

FTSE 100's largest investor in UK infrastructure

The UK’s best mobile and largest fixed networks

  • UK's best multi-award winning network - 99% reach

    5G+ to 70+ million by 2030

    Double average download speeds vs competitors

    1700+ of the most rural communities connected

    Provide the UK's Emergency Services Network (ESN)

    Wembley, Murrayfield, Silverstone - 5G at the UK's busiest venues

  • Full fibre for 20+ million homes & businesses (60%) and fastest rollout in Europe

    Ambition to reach 30 million by the end of 2030

    Handles the equivalent of 6.4 million HD streams at once, during peak periods

    Network spans from Sullom Voe to the Isles of Scilly

    UK's largest WiFi hotspot network: 5 million

    Perform 45 million network health checks per minute

Secure and sustainable

Protect the UK by blocking 1.6 billion online threats

Retired 3G: energy saving equivalent to charging 4 billion+ smartphones

Switched off legacy network elements: saved energy equal to powering 8,000+ UK homes

Recycled over 5,600 tonnes of copper from legacy equipment

The world’s first telco driving UK progress

1846

First national communications network in the world

1891

First transnational submarine telephone link

1896

First to demo communication without wires

1926

Installed iconic UK phone boxes

1926

Took part in first transatlantic call

1937

Supported launch of 999 service

1948

Provided telephony for launch of NHS

1965

Opened BT Tower, a key radio hub

1968

Launched world’s first digital exchange 

1969

Brought NASA moon‑landing coverage to Europe

1972

Opened the world’s largest satellite station

1982 - 1994

Led early optical‑fibre breakthroughs

1984

Launched the first international video‑conference service

1986

Laid the first international fibre‑optic cable

1988 - 2014

Upgraded copper networks to high‑speed

1989

Launched the first in‑flight satellite phone service

1999

First in the world to make a live GPRS call

2012

Made London 2012 the most connected Games

2012

First to launch 4G in the UK

2019

First to launch 5G in the UK

2022

Launched the world's first quantum‑secure metro network trial

2024

First UK operator to rollout Wi-Fi 7

2025

First to launch ARC in a distributed mobile network

2025

First major UK operator to offer satellite home broadband

We know our customers, communities and the country depend on secure, resilient, and reliable connectivity to power their lives, businesses, and the economy. Delivering that high-quality connectivity every day for millions of people is what matters to us. It’s what is driving us to modernise the UK’s digital infrastructure, build the most powerful networks at unprecedented speed and scale, and shape cutting-edge connectivity using the latest technologies – including AI and quantum. By connecting more customers to the nation’s best networks, we’re making sure that our connected world is a better world.

Greg McCall Chief Security and Networks Officer

Networks business structure

Greg McCall

Chief Security and Networks Officer
Biography

Appointed January 2026.

Since joining BT in 2013, Greg has held senior roles across the business, most recently as BT’s Chief Networks Officer. Greg played a pivotal role in launching the UK’s first 5G network, delivering the Emergency Services Network, and led the rapid rollout of BT Sport. Under his leadership, BT achieved industry-leading performance, including the only 900-point score in the Umlaut Benchmark, and introduced cutting-edge products like Wi-Fi 7.

Prior to BT, Greg spent 17 years in senior roles at TalkTalk and Carphone Warehouse.

Close
Greg McCall

Les Anderson

Chief Information Security Officer
Les Anderson

Kirsty Baxter-Smith

Director of Operational Resilience & Service Management
Kirsty Baxter-Smith

Gabriela Styf Sjöman

MD, Research and Commercialisation
Gabriela Styf Sjöman

Pete Bell

MD, Fixed Networks
Pete Bell

Chris Bramley

Chief Networks Architect
Chris Bramley

Paul Mason

Director of Delivery and Transformation
Paul Mason

Reza Rahnama

MD, Mobile
Reza Rahmana

Geoff Sage

Director of Operations and Field
Geoff Sage

Ed Briggs

Chief Financial Officer
Ed Briggs

Dan Rider

Director of HR
Dan Ryder

Suzanne Gilbert

Principal Lawyer, Networks and Research
Suzanne Gilbert

Mandy Dodwell

Senior Business Manager
Mandy Dodwell

Giles Barron

Principal External Communications, Technology, Innovation and Security
Giles Barron
Openreach engineer installing fibre
Openreach engineer installing fibre

Increasing network capacity

The demands on network capacity are always increasing. And we’re always exploring ways of expanding that capacity. Currently, we’re looking at:

  • Developing and demonstrating new optical network technologies – right back to the fundamental physics
  • Developing innovative radio access network (RAN) technologies, including Massive MIMO, small cell and open RAN (O-RAN) technologies
  • Continuing to push the capabilities of our copper access network
  • Exploring alternative technologies such as satellite and drone based broadband for remote areas
Warehouse colleague
Warehouse colleague

Laying stepping stones to a future network

A future network needs future-first thinking; we have to build enablers into the current network that will make that future network possible. It’s as if we’re leaving tools for our developers to pick up further down the line. So we’re embedding enablers of emerging technology into the network. Things like cloud-native network architecture, AI and intelligent network management tools.

Two women looking at a mobile phone
Two women looking at a mobile phone

Optimising network performance

We strive to understand all aspects of our networks performance, from the fundamental network metrics (speed, latency, throughput, downtime, and so on – all the usual numbers on the dashboard) through to the true customer-level quality of experience (QoE).  This allows us to give the customer the best experience for their needs, every time.

Amelia Winterburn
Amelia Winterburn

Exploring the science of networks

To keep our place as Network leaders we’re continuously innovating around network technology, pioneering the next generation of communication capabilities to deliver the ultimate converged customer experience.

BT Group's first self-powering mobile site, located in the Shropshire Hills
BT Group's first self-powering mobile site, located in the Shropshire Hills

Enhancing network energy efficiency

With an ambition to become a net zero business by 2031, improving the energy efficiency of our networks is a major priority for us. Whether using emerging tools like AI and machine learning to dynamically match power consumption with network usage, switching on our first renewably powered RAN site, or turning off energy-inefficient legacy technologies, we’re making strong progress towards delivering against this objective across both our fixed and mobile networks.