Your connected world
Always within reach
Whether you’re improving today’s operations or preparing for tomorrow’s technologies, we’re here to help shape the next chapter.
ABOUT US
A tale of quiet pioneers
When networks work, nobody notices. That’s how it should be.
As the UK’s No.1 TowerCo, we have a 40% share of the UK’s mobile infrastructure. More than 60% of the country’s mobile traffic runs through our 16,500+ site estate.
On each of these sites, we manage the access, planning, engineering and maintenance, so mobile operators and public services can focus on keeping people connected.
As connectivity continues to be just as essential as water, transport and energy, we will continue to strengthen the secure and resilient digital infrastructure that underpins it all.
CONNECTIVITY IN ACTION
From restoring critical connectivity when healthcare services were at risk, to scaling 5G capacity across a city where demand keeps growing, discover Cornerstone in action.
CASE STUDY
Scaling London’s 5G with 125+ Quadstack upgrades
When London’s demand for data threatened to outpace its network capacity, mobile operators needed to upgrade infrastructure in one of the world’s most congested environments. Co-ordinating the project with WHP Telecoms, M Group Telecom, local authorities and landlords, we delivered over 125 Quadstack upgrades in just 13 months. By integrating new power, fibre, and antenna systems, we helped deliver the capacity and performance needed to support how London lives and works.
“Reaching [so many] upgrades in this timeframe is a real achievement and is reflective of the strong partnership we’ve built with Cornerstone. This has been a complex programme with a lot of technical and operational dependencies, delivering it at this pace required a genuinely collaborative approach from all stakeholders.”
Rob Potter, CEO, WHP Telecoms
CASE STUDY
Restoring crisis care when hospital connectivity flatlined
When a hospital’s crisis hub lost its mobile signal, the mental health teams could no longer reliably support patients or communicate with emergency services. We worked closely with the NHS trust and Vodafone to find a suitable spot for a temporary mast. By installing this equipment in record time, we restored the connection, allowing medical staff to get back to their essential work and making sure that patients in need could always get through.
“Connectivity is hugely important to us. Our patients ring us in crisis every day, and we need to be there to support them in an instant. We cannot afford for our service to drop. Speed and reliability are everything.”
Karen Mawson — Operational Manager at Barnet Enfield and Haringey Mental Health NHS Trust
CUSTOMERS
Our knowledge and expertise ensure excellence. From site acquisition to design, construction and maintenance, we bring value to our customers now and for the future.
Proud sponsor of Cornwall Air Ambulance Trust
With a shared commitment to community impact and social responsibility, our partnership with Cornwall Air Ambulance Trust underscores the life-saving importance of mobile infrastructure. Together, we help ensure reliable connectivity supports the charity’s critical missions across Cornwall, adapting to meet the region’s expanding and contracting population throughout the year and serving both local communities and seasonal visitors alike.
Proud sponsor of Cornwall Air Ambulance Trust
With a shared commitment to community impact and social responsibility, our partnership with Cornwall Air Ambulance Trust underscores the life-saving importance of mobile infrastructure. Together, we help ensure reliable connectivity supports the charity’s critical missions across Cornwall, adapting to meet the region’s expanding and contracting population throughout the year and serving both local communities and seasonal visitors alike.
