NESO
UK National Energy System Operator; managing a 50 GW data-centre grid queue that exceeds national peak demand — the bottleneck that drove OpenAI to pause its UK Stargate site.
NESO, Britain's system operator, began issuing the first Gate 2 connection offers on 13 May 2026 under its reformed queue, giving AI Growth Zone sites priority while roughly 45 GW of other demand still waits behind them.
Last refreshed: 4 August 2026 · Appears in 1 active topic
Can NESO's Curate reform shift enough of 125 GW of queue to unlock UK data centre investment?
Timeline for NESO
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Data Centres: Boom and BacklashIssued the first transmission connection offers under Gate 2 Phase 1 beginning mid-May 2026
Data Centres: Boom and Backlash: UK Gate 2 grid offers begin issuingBackground
NESO, the National Energy System Operator, became Britain's independent energy system operator in October 2024, taking over the planning function previously held inside National Grid as National Grid ESO. It is government-owned but operates independently of both National Grid, which still owns the physical transmission assets, and Ofgem, which regulates prices and licences.
NESO's mandate is to plan the energy system as a whole rather than simply operate the existing network, which gives it scope to prioritise or reorder connection requests according to national need rather than order of application alone. That distinguishes it from National Grid, the asset owner, and from Ofgem, the price-setting regulator.
NESO runs the Curate queue-reform programme jointly with Ofgem, aimed at clearing speculative applications that hold slots for years without building, freeing capacity for both data centres and renewable generation competing for the same connections.
NESO began issuing reformed Gate 2 offers
NESO's Curate programme is the process, not the price: it decides who moves and in what order, while Ofgem separately decides what a place costs. From mid-May 2026 NESO started issuing the first offers under the reformed system, with data centres inside designated AI Growth Zones getting priority queue positions, bill discounts and permission to build their own high-voltage lines, against a queue that had grown to more than 45 GW with waits of up to 15 years.
By 27 February 2026 NESO's own figures showed the data-centre sub-queue, 50 GW, already exceeding the 45 GW national peak, with the total demand queue at 125 GW; that scale is why NESO frames Curate as triage rather than expansion.