OpenAI to Open First Permanent London Office in 2027 Amid UK Data-Centre Pause

TL;DR: OpenAI has signed its first permanent London office at Regent Quarter in King’s Cross, with capacity for 544 staff and an expected 2027 opening. The Microsoft-backed company has framed London as its largest research hub outside the US — even as it paused a major British data-centre project last week over regulatory and energy-cost concerns.

The new space spans Jahn Court and the Brassworks Building and represents a material step up from OpenAI’s current London footprint of roughly 200 staff covering research, engineering, policy, customer support and sales.

Context and Background

The commercial announcement lands against a conflicted backdrop for UK AI infrastructure. Last week OpenAI paused its main British data-centre project, citing what it called an “unfavourable regulatory environment and high energy costs” — a public rebuke of the UK government’s stated ambition to position the country as a global AI hub. Signing a 544-seat office lease days later reframes that pause as a separation of concerns rather than a retreat: research and commercial presence stay in London; compute moves elsewhere.

For the UK government, the pattern matches one seen with other hyperscalers. Microsoft, Google DeepMind and Anthropic all maintain flagship London research offices while placing large-scale compute in markets with cheaper power and more accommodating planning regimes. The economic contribution of that split is real (high-wage research jobs), but it makes sovereign compute capacity harder to build.

The 544-seat target also gives a rough scale reference for London as an AI labour market. Combined with DeepMind’s King’s Cross headcount and Anthropic’s London expansion, the cluster is now competing directly with Silicon Valley for senior research talent — a shift that would have been implausible five years ago.

Looking Forward

For UK policymakers, the OpenAI announcement is partial vindication of London’s research appeal but also a pointed signal on the compute gap. Expect renewed political attention to energy pricing and planning reform for data centres ahead of the next fiscal event, and a continued pattern of US AI labs locating intellectual capital in the UK while routing infrastructure spend abroad.