London, 25 March 2026 — Telehouse Europe and Proptivity have partnered to deliver indoor 4G and 5G connectivity across commercial buildings in London, targeting the signal blackspots that persist inside modern, energy-efficient office blocks.
Proptivity builds and operates shared in-building mobile infrastructure under a neutral host model, allowing multiple mobile network operators to deliver coverage through a single deployment. The company is using Telehouse's London Docklands campus as its UK interconnection hub, connecting directly with UK mobile operators and extending services to enterprise buildings across the capital.
The problem they are addressing is straightforward: as commercial buildings adopt materials and glazing that improve energy efficiency, mobile signals struggle to penetrate internal spaces. The result is dropped calls, patchy data and the familiar experience of walking around a building to find signal. For property owners competing for tenants in a hybrid working market, reliable in-building mobile coverage has become a basic expectation rather than a differentiator.
Telehouse is also supplying fibre-delivered timing from the National Physical Laboratory, providing precise synchronisation for indoor 5G deployments. Accurate timing is essential for 5G performance, and in commercial buildings where rooftop satellite antenna installations are impractical, fibre-based timing offers a more resilient alternative.
Telehouse's London Docklands campus sits at the heart of the UK connectivity ecosystem. Businesses now see dependable mobile coverage as a basic requirement of office space.
With Telehouse's support, we are delivering highly accurate timing to our indoor 5G systems in London. This precision is critical to ensuring consistent, high-quality mobile performance inside buildings.
NPL maintains the UK national timescale and makes highly accurate, traceable time available to industry. For indoor 5G sites where rooftop GNSS is difficult, fibre-delivered timing provides a practical alternative and an additional layer of resilience, helping networks remain stable even if satellite timing is disrupted.
