UK Colocation Providers: How to Evaluate and Choose

How the UK market is structured

The UK colocation market is one of Europe's most developed. At the top end, a small number of global hyperscale and enterprise operators run large multi-facility campus sites, primarily in London and the South East. These organisations typically serve large enterprise, financial services and technology companies with significant scale requirements and complex connectivity needs.

Below these, a mid-tier of regional operators serves businesses that do not need hyperscale capacity but do need enterprise-grade infrastructure. These operators often have one to five facilities, frequently in regional cities or areas adjacent to London (such as Hemel Hempstead, Reading or Slough), and typically offer a more direct service relationship than the large campus operators.

At the bottom of the market, smaller single-site operators serve local and SME markets. These can offer competitive pricing but may have lower certification standards, less diverse connectivity, and lower resilience specifications.

What to assess when choosing a provider

Power and resilience: The most important technical specification is the facility's power infrastructure. You should understand the UPS configuration (N, N+1 or 2N), the generator backup (fuel capacity, test frequency), the power feed structure to your rack (single or dual A+B), and the maximum sustainable power density per rack. Tier certification from Uptime Institute is a useful independent validation but is not universal.

Connectivity: Assess the number of carriers present in the facility, the diversity of fibre entry routes, and whether the facility is connected to internet exchanges (the London Internet Exchange at Docklands is the UK's primary exchange). For organisations needing cloud connectivity, check whether AWS Direct Connect, Azure ExpressRoute or Google Interconnect points of presence are available.

Location: Physical location matters for latency, for logistics (hardware delivery, on-site visits), and for compliance. Some regulated industries have requirements around where data can be physically held. London pricing is significantly higher than regional UK pricing for comparable infrastructure; if sub-10ms latency to London is not a requirement, a regional facility is usually the better value choice.

Certifications: At minimum, look for ISO 27001 for information security management. ISO 22301 for business continuity is increasingly standard. PCI DSS is required if you process card payments. For public sector workloads, PSN compliance and Cyber Essentials Plus may be required.

SLAs and credits: The power availability SLA is the most important, typically 99.982% for Tier 3 facilities. Read the credit structure carefully: some providers cap credits at a low percentage of monthly fees that does not reflect actual business impact. Ask specifically what the provider has paid in SLA credits in the past 12 months.

Support model: Understand how remote hands work, what the response time commitment is, and whether on-site staff are present 24/7. For organisations that do not have hardware engineers based near the facility, the quality and responsiveness of remote hands is operationally critical.

Regional UK colocation

Regional UK colocation outside London has improved significantly in the past decade. Manchester, Leeds, Birmingham and Bristol all have mature colocation markets with enterprise-grade facilities and good connectivity options. Regional pricing typically runs 40 to 60 percent below comparable London rates, making it financially attractive for workloads where sub-5ms latency to London is not a hard requirement.

For organisations with Northern England, Midlands or South West operations, a regional facility can also reduce the physical burden of on-site support visits and hardware logistics.

Frequently asked questions