Our fibre-only network is a state-of-the-art optical infrastructure that addresses the growing performance requirements for Mobile Network Operators (MNO), Neutral Hosts, Site Providers and Wireless Operators. As the sector evolves the infrastructure required to meet the demands of 5G ultra-low latency applications, it’s imperative that they have access to a networks that can last for generations to come. Our partners are benefitting from leading products, economics and service across the UK.

Why we're different

As the UK’s largest independent, wholesale only, fibre operator, we’re a proven and trusted challenger within the industry. Our revolutionary digital infrastructure is designed and built to outlast, unhindered by technology of the past and built in a sustainable way to deliver an exceptional user experience.

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Our independent, wholesale-only focus means every pound you spend with us, does not directly or indirectly benefit your strategic competitors. A partnership with CityFibre means your success is our success.

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Our investment in both local teams and infrastructure, combined with long term relationships with Local Authorities and key city stakeholders ensures we provide a smooth delivery on projects and a great experience to you.

Responsible Business


We deliver lasting solutions that are built for purpose and easily scalable to meet the demands of tomorrow, with sustainability at the core.

One network to serve all

Our network is built to serve entire communities across the UK. We undertake pre-planning to serve all known mobile base station locations and our near-ubiquitous dense fibre coverage means you can connect small cells at every future location, without incurring excessive network build charges.

How our Dark Fibre benefits you

A true Dark Fibre provider

Unlike other Dark Fibre providers, dense local access Dark Fibre RAN backhaul is fundamental to our business. We make our products and services available to the market while seeking ongoing feedback from our customers to capture and align our roadmap to future requirements through a mix of bespoke and standard solutions that help MNOs densify their network.

Greater control on costs

Our Dark Fibre enables operators to move away from opex based services, gain control of costs for increasing bandwidths and support future RAN architectures like CRAN, VRAN and ORAN while achieving the lowest latency needed to underpin the latest 5G specifications (3GPP).

Long term security of tenure

We believe that Dark Fibre is an integral part of the MNO network architecture and future-proofs the network. Such a cornerstone element of the network must be secured on a long-term basis to achieve the full economic and operational advantages.

High-tech Fibre Exchanges

Our state-of-the-art Fibre Exchanges (FEXs) provide access to over 150 Edge Co-Lo facilities in the heart of our cities, with multiple exchanges per city, designed to offer a low latency 5G future and a better edge experience.

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""A competitive fibre backhaul market is critical for the fast and efficient rollout of 5G. CityFibre are aggressively rolling out fibre across Britain and our strategic partnership with them will use the UK’s largest 5G spectrum portfolio to deliver the fastest 5G network nationwide.""

Three UK

Products darkfibre
""Widespread availability of fibre is key to the success of 5G mobile and home broadband. Dark fibre provides limitless capacity, greater flexibility and ensures costs can be controlled by mobile operators as 5G traffic grows""

Three UK

Stephen Lerner, General Counsel & Regulatory Affairs Director

""We're delighted to work with CityFibre. The technology will connect the 5G Small Cells network, providing next-gen connectivity to deliver digital services across the city. This partnership is the vital next step in unlocking the benefits of the new network to accelerate Sunderland’s ambitions to become one of the UK’s most advanced smart cities""

BAI Communications UK

Andrew Conway, Director of Solutions and Innovation

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