Great British Grid could give developers and businesses more freedom to build electricity connections themselves, as the Government tries to cut one of the delays facing power-hungry development.
The new publicly owned body will sit within Great British Energy and invest public capital alongside private money in electricity network infrastructure. It is intended to work alongside existing network operators, while separate reforms widen self-build connections and competitive tendering for transmission projects.
For developers, though, a faster connection process is not the same thing as planning permission or a clear route to energisation. Network capacity, connection offers, queue management, physical construction, land rights and statutory consents remain different parts of the job.
Great British Grid self-build is the change developers should watch
The most immediately useful part of Great British Grid for developers is the promise to expand “self-build connections”. The phrase sounds more radical than it is at distribution level, because competition in connections already exists.
Ofgem says connecting customers can already carry out some contestable work themselves or use an independent provider. Government guidance also confirms that Independent Connections Providers can build electricity networks to the standard required for adoption by a network operator. Non-contestable work and upstream reinforcement can still remain with the incumbent network company.
The bigger Great British Grid opportunity concerns high-voltage transmission connections. Ofgem’s June 2026 demand connections update, now hosted by Planning Geek, says high-voltage contestable build is currently available only in limited circumstances. It gives the example of a site within 2km of the existing transmission system where the connection assets would not potentially be shared.
Ofgem is developing broader routes for customers to build and own high-voltage connection assets, or build them and transfer them after completion. Options include an independent transmission owner licence and a possible class exemption, alongside changes to electricity licences, industry codes and supporting documents.
That means the Government’s “where appropriate” qualification for Great British Grid matters. There is not yet a blanket right for every housing developer, data centre, battery project or industrial scheme to design and construct whatever grid infrastructure it needs. Scope, technical standards, ownership, adoption and the treatment of shareable assets are still being worked through.
At distribution level, independent providers are already familiar territory for larger and multiple connections. At transmission level, Ofgem says it aims to consult on the independent transmission owner licence and supporting reforms during autumn 2026. No universal commencement date for the expanded self-build model has yet been announced.
The Irish evidence is real, but it comes with a warning
The Government says similar reforms in Ireland cut connection times by up to 11 months. That figure is not simply a press-office comparison. Ofgem’s own June paper says case studies from Ireland found some contestably delivered projects were around 20% cheaper and 11 months faster.
But Ofgem immediately qualifies the comparison. Faster self-build does not guarantee faster energisation if work is also needed further upstream on the existing network. A customer may be able to procure and construct its own connection assets more efficiently while still waiting for reinforcement elsewhere in the system.
That is an important distinction for anyone assessing development viability. The connection cable or substation serving a site can be only one element in a much larger network programme.
What Great British Grid will actually do
Great British Grid is not replacing National Grid, distribution network operators, Ofgem or the National Energy System Operator. The Government says existing network operators’ roles remain unchanged, Ofgem remains the independent economic regulator and NESO continues to operate, plan and coordinate the electricity system.
The new body will instead be able to invest public capital alongside private investment in network projects, support or co-invest in appropriate infrastructure and compete as competitive tendering of transmission projects is expanded. The stated aim is to add investment and competition rather than create a single national network operator.
The announcement also sits beside wider connection reforms already under way. Government says more than 300GW of speculative capacity has been removed from the connection queue. Ofgem has separately been consulting on measures aimed at speculative data-centre demand, including project milestones and a proposed commitment fee.
Prime Minister Andy Burnham told Labour’s conference that the new body should “speed up connections so businesses can expand and grow more quickly”. The BBC reported ahead of the announcement that faster grid connections were being presented as a response to a problem that could be “crippling for businesses”.
The development consequences will vary sharply by project. Major industrial schemes, logistics, data centres, battery energy storage, solar and wind generation, EV charging hubs and some large housing developments can all have substantial electricity requirements. But it would be wrong to treat every slow development as a grid problem, or every grid delay as a planning delay.
Grid capacity and planning are not the same bottleneck
The current planning policy framework for major infrastructure already recognises the importance of electricity networks. The 2026 National Planning Policy Framework goes further, telling plan-makers to understand network capacity and make provision for additional infrastructure. It also expressly recognises adequate grid connections as a locational consideration for power-intensive development such as data centres.
In practice, five questions can be easily muddled together:
- Does the development itself have planning permission or another necessary consent?
- Is sufficient electricity network capacity available in the right place?
- Has the project obtained a viable grid connection offer?
- Can it retain and progress its place in the connections queue?
- Can the physical connection infrastructure actually be consented, built and energised?
Great British Grid and the self-build reforms are intended to help with several of those stages, but they do not collapse them into one process.
Great British Grid does not bypass planning and land rights
The Great British Grid announcement on 29th September does not itself change planning law. Depending on the infrastructure involved, new substations, overhead lines, underground cables and associated works can still engage several separate regimes.
Nationally significant electricity network infrastructure can fall within the Planning Act 2008 and the Development Consent Order process, guided by the 2025 energy National Policy Statements EN-1 and EN-5. Other overhead lines can require consent under section 37 of the Electricity Act 1989 where the statutory exemptions do not apply.
In England, at the more routine end, statutory electricity undertakers have permitted development rights under Part 15 of the GPDO for specified power-related development. Those rights have limits and conditions and do not turn every connection project into permitted development.
Environmental assessment may also be relevant, while projects can depend on compulsory acquisition powers, wayleaves, easements, highway consents and agreements with landowners. Undergrounding a cable may avoid the visual impact of pylons, for example, but it does not make land assembly, environmental effects or highway works disappear.
This is the point behind a useful industry counterweight to the launch coverage. An unnamed network industry source told the Guardian that competing providers are still “using the same planning system”. Changing who can build infrastructure may improve procurement and competition, but it does not automatically remove the consent route that infrastructure must pass through.
The £4bn figure is not a confirmed GB Grid budget
Several national reports have attached a figure of up to £4bn to Great British Grid. The Times described the body as having access to existing Great British Energy resources, while techUK said it would be funded through Great British Energy’s existing £4bn budget.
The primary Government announcement is more cautious. It says initial start-up costs will come from Great British Energy’s existing budgets, but that the long-term budget for the expanded grid remit will be considered in a future Spending Review.
So £4bn should not currently be read as a ring-fenced Great British Grid construction budget. Official Government material describes more than £8.3bn of investment by Great British Energy and Great British Energy Nuclear over the Parliament, but that is a wider programme and is not a GB Grid allocation. The £4bn figure in current reporting is therefore not confirmed by the primary GB Grid announcement, and the long-term grid budget remains for a future Spending Review.
Great British Grid is likely to face an early data-centre test
The data-centre sector gives Great British Grid an obvious stress test because very large loads can make a viable connection central to site selection and delivery. Ofgem said in July that demand connection applications had risen from 41GW to 125GW in under a year, with data-centre projects accounting for at least 80GW of that total.
techUK’s chief operating officer Matthew Evans said grid delays were among the largest hurdles for UK data-centre development and described self-build connections as “low-hanging fruit”. The organisation nevertheless noted that the detail remains to be seen.
That caveat matters beyond data centres. A developer that can take more control over a connection may reduce dependency on a network company’s delivery programme. It cannot manufacture spare upstream capacity, dispense with technical standards or sidestep planning and land rights.
What developers should watch next
The Great British Grid announcement sets a direction rather than a finished connection rulebook. The next useful documents are likely to be Ofgem’s autumn consultations on high-voltage self-build, transfer and the proposed independent transmission owner licence, alongside the code and licence changes needed to make those models work.
Developers will also need detail on which projects fall within “where appropriate”, how adopted assets will be treated, the boundary between contestable and non-contestable work, and whether upstream reinforcement remains on the critical path.
For major energy projects, the planning question remains just as important. The Government can widen the pool of organisations able to finance and construct network infrastructure, but each scheme still has to secure the consents, land and environmental approvals its route requires.
Great British Grid may therefore prove most valuable where the connection process itself is the bottleneck. Where the real constraint is unavailable upstream capacity, a difficult route, compulsory acquisition, environmental effects or a major consent, changing the builder alone will not solve it.
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