Microsoft has ended its involvement in what was to be Britain’s largest AI data centre, the £2bn site Nscale is building at Loughton in Essex. Microsoft had said it would fund a supercomputer there. It declined to comment on leaving.
The number that explains it
The site was due to receive its power supply at the end of this year. Nscale has been told that will not now happen until the 2030s. The company calls it a London-wide grid issue, first reported by the Telegraph on Sunday, and says it has no effect on its other contracts.
That is the whole story in one sentence. A data centre is a building full of equipment that does nothing at all until it is connected to enough electricity, and a connection date that moves from December to the next decade is not a delay. It is a different project.
What Nscale says now
Nscale says it remains committed to Loughton and to the UK, and is “exploring alternative power sources for the site, in addition to other expansion sites in the UK”. On Microsoft it is pointed: “Our relationship with Microsoft remains strong and long-term.” The two continue to work together in Norway, Portugal and the United States.
Only last month Microsoft said some of the $30bn it is investing in the UK would fund the Loughton supercomputer. The site is expected to create 250 permanent jobs when it eventually opens.
That last figure deserves to be read slowly. Two billion pounds, 250 permanent jobs. Data centres are capital, not employment, and any country weighing one should price it as infrastructure rather than as a jobs programme.
Why this matters in Dhaka
Bangladesh has spent two years discussing data-centre investment, and the conversation is usually about land, tax treatment and bandwidth. This is a reminder that the binding constraint is none of those. It is a firm, dated, contractual grid connection at the capacity the building needs — and the United Kingdom, with a mature grid and a government that wants the investment, has just failed to supply one on time to its largest project.
The question worth asking of any proposal here is therefore narrow and awkward: what is the guaranteed connection date, at what megawatt figure, and what happens contractually if it slips? A site with planning permission and no firm power date is a field. The same arithmetic was visible in Scotland’s twenty-three proposed hyperscale sites, where the proposed demand exceeded what the grid could deliver by a wide margin.
There is a second lesson in Microsoft’s silence. The anchor tenant left and the developer stayed, which is the normal order of things: the company with the cheapest alternative moves first. For a host country, the risk is being left holding a half-built asset whose economics only ever worked with the tenant who has gone.
One phrase in Nscale’s statement is worth translating. “Exploring alternative power sources” usually means on-site generation — gas turbines, in practice — built because the grid cannot deliver in time. That solves the schedule and creates a different problem: a facility burning fuel on site, with its own emissions, in a country whose data-centre pitch rests partly on clean power. Several operators in the United States have taken that route already, and the environmental argument has followed them there.
