Microsoft Azure — UK South Region (London)

Microsoft Azure UK South — the London region — is Microsoft's primary UK cloud and AI data center, launched in 2016 alongside the paired UK West (Cardiff) region. The London facilities span multiple data centers in the Thames Valley and Greater London area, serving as the backbone of Microsoft's UK enterprise and public sector cloud operations.

The UK South region is the primary deployment zone for Azure OpenAI Service in the UK, hosting GPT-4, GPT-4o, and Microsoft Copilot inference for UK enterprises requiring UK data residency under UK GDPR. UK government customers include NHS England (AI-powered diagnostics via NHSX), GCHQ (via the UK Government Secure Cloud framework), the Ministry of Defence, and Cabinet Office digital services. Microsoft holds an IL5 certification for UK public sector workloads.

Microsoft announced a £2.5 billion AI investment in the UK in May 2024 — the largest in the company's UK history — specifically targeting Azure AI infrastructure expansion in the London and Wales regions. The investment includes training 250,000 people in AI skills by 2025 and a new AI and Research Development hub in London. UK South operates on 100% renewable energy through long-term PPAs with UK offshore wind projects including those in the North Sea.