Top 10 Telecommunications Companies in United Kingdom 2025

We’re tracking 12,358 Telecommunications companies in United Kingdom.

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Companies	Employees	HQ location	Revenue	Founded	Estimated Traffic	Industries
Vodafone	View 100,522 employees	🇬🇧 England, London+54	$ >1000M	1982	52,799,998	Internet, Telecommunications
Liberty Global	View 3,095 employees	🇬🇧 London Borough Of Hammersmith And Fulham, England, London+12	$ >1000M	2005	106,916	Telecommunications, Internet
Inmarsat	View 43 employees	🇬🇧 England\|London Inner\|London (EC)\|London EC1Y, London+5	$ >1000M	1985	380,900	Satellite Communication, Telecommunications
Talktalk Group	View 96 employees	🇬🇧 England\|London Inner\|London (W)\|London W11, London+2	$ >1000M	2009	39,564	Telecommunications, Internet
Bt Group plc	View 51,036 employees	🇬🇧 London Borough Of Tower Hamlets, England, London+37	$ 500-1000M	2021	196,175,002	Internet, TV
Sky	View 27,789 employees	🇬🇧 England\|London Outer\|Twickenham (TW)\|Isleworth, Isleworth+39	$ 500-1000M	1989	227,900,008	Telecommunications, Internet
O2	View 3,425 employees	🇬🇧 Reading, England, Reading+4	$ 500-1000M	2018	87,390,998	Mobile, Mobile Devices
Ee	View 8,863 employees	🇬🇧 Cheshire West And Chester, England, Ellesmere Port+19	$ 500-1000M	2012	65,804,998	Mobile, Telecommunications
Virgin Media O2	View 13,713 employees	🇬🇧 Reading, England, Reading+5	$ 500-1000M	2007	135,681	Telecommunications, Internet
UK Power Networks	View 2,778 employees	🇬🇧 England\|London Inner\|London (SE)\|London SE1, London+2	$ 500-1000M	1999	982,608	Electrical Distribution, Energy
Vodafone	View 100,522 employees	🇬🇧 England, London+54	$ >1000M	1982	52,799,998	Internet, Telecommunications
Liberty Global	View 3,095 employees	🇬🇧 London Borough Of Hammersmith And Fulham, England, London+12	$ >1000M	2005	106,916	Telecommunications, Internet
Inmarsat	View 43 employees	🇬🇧 England\|London Inner\|London (EC)\|London EC1Y, London+5	$ >1000M	1985	380,900	Satellite Communication, Telecommunications
Talktalk Group	View 96 employees	🇬🇧 England\|London Inner\|London (W)\|London W11, London+2	$ >1000M	2009	39,564	Telecommunications, Internet
Bt Group plc	View 51,036 employees	🇬🇧 London Borough Of Tower Hamlets, England, London+37	$ 500-1000M	2021	196,175,002	Internet, TV
Sky	View 27,789 employees	🇬🇧 England\|London Outer\|Twickenham (TW)\|Isleworth, Isleworth+39	$ 500-1000M	1989	227,900,008	Telecommunications, Internet
O2	View 3,425 employees	🇬🇧 Reading, England, Reading+4	$ 500-1000M	2018	87,390,998	Mobile, Mobile Devices
Ee	View 8,863 employees	🇬🇧 Cheshire West And Chester, England, Ellesmere Port+19	$ 500-1000M	2012	65,804,998	Mobile, Telecommunications
Virgin Media O2	View 13,713 employees	🇬🇧 Reading, England, Reading+5	$ 500-1000M	2007	135,681	Telecommunications, Internet
UK Power Networks	View 2,778 employees	🇬🇧 England\|London Inner\|London (SE)\|London SE1, London+2	$ 500-1000M	1999	982,608	Electrical Distribution, Energy

1. Vodafone

Vodafone, headquartered in London, UK, is a giant in the telecommunications industry, providing a wide range of services including mobile phone, broadband, and TV across various markets. A key player in digital connectivity, Vodafone offers solutions that cater to both individual consumers and large enterprises, enhancing business communications and connectivity. In the UK, Vodafone is continuously expanding its 5G network, dedicating significant resources to advance the nation’s telecom infrastructure and support the burgeoning demand for high-speed, reliable mobile services. This commitment helps maintain its position as a leader in technological innovation and customer service within the telecommunications sector.

Location 🇬🇧 England, London	Size View 100,522 employees
Revenue $ >1000M	Industries Hardware, Internet Services, Mobile, Messaging and Telecommunications, Information Technology
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2. Liberty Global

Liberty Global, based in London, UK, is a powerhouse in the telecommunications and entertainment sector. This multinational company owns and operates some of the most advanced video, broadband, and telephone services under brands such as Virgin Media, Telenet, and UPC among others. In the UK, Liberty Global through Virgin Media O2—a joint venture—has been at the forefront of delivering ultrafast broadband and high-quality mobile connectivity, renewing its commitment to enhancing consumer access and experience while powering digital transformation across the region. This strategic orientation not only positions Liberty Global as a key player in the UK telecom landscape but also showcases its dedication to technological innovation and excellent customer service.

Location 🇬🇧 London Borough Of Hammersmith And Fulham, England, London	Size View 3,095 employees
Revenue $ >1000M	Industries Hardware, Internet Services, Manufacturing
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3. Inmarsat

Inmarsat, headquartered in London, UK, operates as a pivotal player in the global telecommunications sector, specializing in mobile satellite communications. Renowned for its reliable and secure communication solutions, Inmarsat services a diverse clientele that includes governments, enterprises, and maritime sectors among others. The company’s innovations ensure that, regardless of location, businesses stay connected whether they are in remote areas or international waters. Inmarsat’s commitment to maintaining powerful, global communication links aligns well with its strategy to expand digital connectivity worldwide.

Location 🇬🇧 England\|London Inner\|London (EC)\|London EC1Y, London	Size View 43 employees
Revenue $ >1000M	Industries Hardware, Internet Services, Mobile, Manufacturing
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4. Talktalk Group

Talktalk Group, based in the UK, is a key player in the telecommunications sector, offering a range of services including broadband internet, telephony, and television packages primarily targeted at consumers and business clients. Known for their competitive pricing strategies, Talktalk focuses on delivering affordable yet reliable connectivity solutions, which makes them particularly appealing in the increasingly digital and connected landscape. Their commitment to accessibility and customer service ensures they remain a preferred choice among small to medium-sized enterprises in the UK.

Location 🇬🇧 England\|London Inner\|London (W)\|London W11, London	Size View 96 employees
Revenue $ >1000M	Industries Hardware, Internet Services, Community and Lifestyle, Professional Services, Information Technology, Messaging and Telecommunications, Software
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5. Bt Group plc

BT Group plc, based in London, UK, is a prominent player in the telecommunications industry, providing a wide range of services including broadband, fixed-line services, digital television, and mobile networks. As one of the oldest and largest telecom companies in the UK, BT is integral in driving digital transformation by enhancing connectivity and network reliability across the region. Their consistent focus on innovation and service improvement supports countless businesses and consumers in navigating our increasingly digital world.

Location 🇬🇧 London Borough Of Tower Hamlets, England, London	Size View 51,036 employees
Revenue $ 500-1000M	Industries Internet Services, Media and Entertainment, Video, Hardware, Content and Publishing, Messaging and Telecommunications, Mobile, Gaming, Sports
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6. Sky

Sky, based in the UK, is a dominant player in the telecommunications and media industry. Renowned for its comprehensive suite of entertainment and communication services, including satellite television, broadband internet, and mobile phone services, Sky strives to deliver exceptional quality and innovation. The company has pioneered various customer-centric services such as Sky Q and Sky Glass, constantly redefining home entertainment and connectivity with smart technology integrations, which keep both private customers and businesses well-connected and equipped with cutting-edge media solutions.

Location 🇬🇧 England\|London Outer\|Twickenham (TW)\|Isleworth, Isleworth	Size View 27,789 employees
Revenue $ 500-1000M	Industries Hardware, Internet Services, Messaging and Telecommunications, Commerce and Shopping, Media and Entertainment, Video
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7. O2

O2, part of the Virgin Media O2 consortium in the UK, stands as a reputable telecommunications provider. Based significantly in Slough, O2 is renowned for offering a broad range of mobile telephony and data services across the country. O2’s commitment to improving connectivity solutions for homes and businesses reflects in their continual network upgrades and expansion. The company’s strategic emphasis on providing seamless mobile experiences aligns with its goal to maintain a strong presence in the competitive UK telecom market.

Location 🇬🇧 Reading, England, Reading	Size View 3,425 employees
Revenue $ 500-1000M	Industries Consumer Electronics, Hardware, Mobile, Internet Services, Commerce and Shopping
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8. Ee

EE, part of BT Group plc, stands as a prominent telecommunications provider in the UK. Known for pioneering the UK’s first 4G and now 5G mobile networks, EE offers a comprehensive range of mobile services, including voice, messaging, and data across the United Kingdom. Their focus on network reliability and customer service excellence makes them a strategic player in the ever-evolving telecommunication landscape of the UK, continually enhancing connectivity solutions for individuals and businesses alike.

Location 🇬🇧 Cheshire West And Chester, England, Ellesmere Port	Size View 8,863 employees
Revenue $ 500-1000M	Industries Hardware, Mobile, Internet Services, Consumer Electronics, Commerce and Shopping, Messaging and Telecommunications
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9. Virgin Media O2

Virgin Media O2, situated in the United Kingdom, represents a dynamic fusion in the telecommunications sector, formed through the merger of Virgin Media and O2. As a heavyweight in the industry, the company provides extensive broadband, mobile, and TV services across the UK, catering to a broad consumer base with its state-of-the-art network infrastructure and competitive service offerings. Their strategic focus is not just on connectivity but also on delivering digital solutions that enhance user experience and connectivity, aligning with contemporary digital needs and expectations.

Location 🇬🇧 Reading, England, Reading	Size View 13,713 employees
Revenue $ 500-1000M	Industries Hardware, Mobile, Internet Services, Commerce and Shopping
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10. UK Power Networks

UK Power Networks, based in the UK, deviates from typical telecommunications with its focus on electricity distribution, but is key to the industry’s infrastructure. This company maintains the electricity grid to ensure reliable power supply, crucial for the operation of telecom networks across London, the South East, and the East of England. Their work not only powers residential and commercial areas but also enables essential telecom services, playing a vital role in connectivity and digital growth in these regions.

Location 🇬🇧 England\|London Inner\|London (SE)\|London SE1, London	Size View 2,778 employees
Revenue $ 500-1000M	Industries Energy, Internet Services, Professional Services, Messaging and Telecommunications, Hardware
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