The grid datedecides whether the tenant stays

RThe Telegraph reported on 18 October 2026 that Microsoft had ended its agreement to anchor Nscale's planned data centre at Loughton, Essex. Microsoft said the decision relates to a single site and that it remains committed to the partnership. Grid officials had told Nscale they did not expect to supply power before the 2030s¹. The site was due to open in 2027².

RThe plan was 23,040 Nvidia GB300 chips in a 50 MW building, expandable to 90 MW². Planning permissions were secured³. Nscale says it remains committed to Loughton, is exploring alternative power, and that the grid problem does not affect its other contracts².

RUK Power Networks told The Register it cannot discuss individual connections, and that many data centres able to connect to its network are awaiting works on the national transmission network, which it does not own². Microsoft has not given its reasons itself, and a person familiar told Reuters that Loughton was a small part of its Nscale agreements¹.

CNscale's US filing shows how such dates reach the lease. Certain customer contracts give the customer a right to terminate for delays, and Anthropic may terminate a tranche without liability if delivery timelines are missed. The filing also warns that delays in securing grid connections may occur⁴.

AA planning permission fixes what may be built. A tenant's right to leave over delay fixes who carries the cost of waiting. Until the network gives a firm date, consented land is an option on a future connection, and its value depends on when that date falls and what the owner pays to hold the land meanwhile.

AFour tests decide the price: the network's date against the tenant's longstop date, who bears delay, whether on-site power can bridge the gap and at what cost, and what the land is worth to another user.

ALandowners with consented sites should obtain the network's written date before they sign, and set the tenant's longstop beyond it or share the delay. Lenders should size debt on the date and treat the consent as a precondition. An operator with several sites can absorb the loss of one, and a single site cannot. Demand follows for independent reviews of connection programmes, delay clauses in leases and bridge power plans.

OUR PERSPECTIVE

A consent says what may be built. The grid date says when it can earn.

RMicrosoft has said only that the decision concerns one site. The cancellation terms are unknown, and Nscale has named neither a replacement tenant nor a revised date¹². If the exit proves commercial, or a bridge supply restores the timetable, the grid is a smaller part of the story.

COfgem proposed on 29 July 2026 a commitment fee of £237,500 to £712,500 per MW for large data centre connections, paid on accepting an offer and refunded at energisation. The consultation has closed and a decision is awaited⁵.

IIf the fee thins the queue, dates at paying projects could move forward. That depends on a decision not yet made.