A rapid, repeatable small cell deployment model in one of London’s busiest public spaces.
Trafalgar Square is one of London’s most recognisable and heavily used public spaces. It serves tourists, commuters, workers, nearby businesses and major events, all of which place sustained pressure on mobile networks. In environments like this, the challenge is to maintain enough capacity for large numbers of people to browse, navigate, share content and stay connected at the same time.
High-demand-density locations play a critical role in network performance. They may represent a relatively small share of overall sites, but they carry disproportionate levels of traffic and user expectations. Operators risk their reputation when performance comes under pressure.
They also require deployment approaches that can respond quickly and scale efficiently across similar urban environments.
In high-footfall city-centre environments, traditional macro coverage alone is often not enough to maintain user experience during peak demand.
At Trafalgar Square, the challenge was not coverage but capacity. Users could see signal bars on their phones, but the network still needed to support large numbers of people at the same time, whether during daily congestion or major public events.
When capacity is constrained, even basic services such as web browsing, maps, messaging and uploads can become inconsistent, affecting the experience of people moving through the area.
Trafalgar Square demonstrates a wider challenge facing mobile network operators in dense urban areas across the UK. In high-demand locations, they need solutions that can strengthen performance without the delays, cost, complexity and site feasibility constraints typically associated with traditional site rollout.
Why this environment required a new approach
- High daily footfall
- Frequent major events
- Capacity pressure rather than a basic coverage gap
- Traditional cell site delivery timelines can extend to 2 years or more
THE SOLUTION
We addressed this challenge by deploying small cells on lamp posts in and around Trafalgar Square for Vodafone. This enabled additional capacity to be delivered exactly where demand was highest, without the need for large-scale new infrastructure.
Small cells are well suited to environments like this because they provide additional capacity within a targeted area. When deployed as a coordinated group, they can significantly improve user experience where demand is most concentrated.
When combined with the right access, design and integration model, they become an efficient, scalable solution rather than a one-off intervention.
In December 2022, Ontix deployed and connected seven 4G small cells around Trafalgar Square. In December 2025, we upgraded five of those sites to add 5G capability and transition to a C-RAN architecture. This evolution demonstrates how existing deployments can be enhanced over time to support increasing demand, while improving efficiency through centralised architecture.
The integrated access, design and platform model enabling rapid, repeatable deployment.
Technology choice is important in projects like this, but the delivery model is equally critical. Both phases were delivered and operational within four weeks. This level of speed and consistency is not typical in urban infrastructure delivery and reflects a fundamentally different approach to deployment.
We made that speed of deployment possible through a combination of:
Automated, proprietary
design capability
This platform, enabled through Ontix Nexus, integrates deployment, connectivity and performance into a single operational environment.
By combining these elements into a single operating model, Ontix reduces dependency on fragmented processes and enables greater control, consistency and speed across deployment.
This approach shifts small cell delivery from a complex, time-intensive activity into a scalable, repeatable and commercially viable model that enables operators to scale deployment across multiple high-demand locations.
What the deployment achieved during daily demand and peak event periods.
The deployment delivered clear, measurable improvements in mobile performance.
Independent third-party testing by Inakulum during the West End Live event in June 2023 demonstrated a clear difference in user experience.
During periods of peak demand, Vodafone customers in Trafalgar Square maintained strong and consistent performance.
During the same periods, users on other networks were often experiencing significantly lower speeds, in some cases below 2 Mbps. This proves that targeted small cell deployment, when delivered as part of an integrated model, can materially improve user experience in high-demand environments.
It also shows that the small cell deployment was much more than added infrastructure. It delivered consistent, reliable performance in one of London’s most demanding urban environments. This is particularly important in a location like Trafalgar Square, where mobile performance shapes how people navigate the city, share content and stay connected during busy public events.
What this deployment demonstrates for operators, cities and high-demand urban environments.
This deployment establishes several important principles for operators, asset owners and city stakeholders.
High-demand urban locations need to be assessed based on user experience and capacity, not signal alone. Small cells are a proven way to improve mobile performance in areas with concentrated demand, particularly where traditional deployment models are too slow or inflexible.
Ontix makes deployment more repeatable through access, design automation and integrated connectivity, dramatically reducing rollout times. This enables infrastructure to be delivered at a pace and scale aligned to modern network demand.
For Ontix, the Trafalgar Square small cell programme demonstrates how a scalable deployment model can reliably support better performance in high-demand urban environments. It provides a repeatable approach that can be applied across cities and similar locations, supporting long-term network performance and investment efficiency.