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Enough power for 2 million homes, mostly under the sea: Sea Link gets the go-ahead

Qurexa Editorial Team31 October 20268 min read 0 0
Enough power for 2 million homes, mostly under the sea: Sea Link gets the go-ahead

What happened

On 30 October 2026, the Department for Energy Security and Net Zero approved a project called Sea Link. It is a 2 gigawatt undersea electricity connection between Suffolk and Kent, and it will run mainly offshore. The developer is National Grid. A gigawatt is a thousand megawatts. The department says Sea Link will be able to carry enough electricity to power about 2 million homes. The approval is a development consent order. That is the legal permission large national infrastructure projects need in England before they can be built. It follows an examination process run by the Planning Inspectorate. The same announcement approved two large solar projects. Great North Road Solar and Biodiversity Park, near Newark in Nottinghamshire, has a capacity of 800 megawatts. The developer, Element Green, estimates it could power about 400,000 homes a year. It becomes the joint largest solar farm in the country by capacity, alongside Springwell Solar Farm, which was approved earlier in the year. Frodsham Solar, north of Frodsham in Cheshire, combines solar panels with battery storage, and the developer says it could generate enough electricity for 40,000 homes. The department said these decisions bring the number of nationally significant clean energy projects approved since July 2024 to 39. Michael Shanks MP, the Energy Minister, said: 'Britain's future rests on rebuilding the national grid so renewable energy and businesses can connect.' He said the work will 'bring bills down for good.'

Why this matters

Most conversations about energy are about generating it. This one is about moving it, and that turns out to be the harder problem. Britain has built a lot of wind power, much of it in the north and off the east coast. A great deal of the demand is further south. The cables in between were designed for a different system, built around a smaller number of large power stations in different places. When the network cannot carry everything that is being generated, something awkward happens. Wind farms are asked to switch off, and they are paid for the electricity they would have produced. These are called constraint payments, and they come out of what everyone pays. The department says Sea Link will ease grid pressure and reduce payments to generators asked to switch off when the network cannot carry their output. So the argument for a cable like this is not mainly about greener electricity. It is about wasting less of the electricity we have already paid to build the capacity for. There is a second reason this matters, and it is about speed. Projects of this size take years to examine and years to build. A decision made in October 2026 is a decision about the electricity system of the early 2030s. That is a long way off, which is precisely why the timing of decisions attracts so much attention. The approval also sits alongside a wider change. The department noted that the Prime Minister has announced a Great British Grid, a publicly owned body within Great British Energy that will combine public and private investment to speed up network upgrades. The government is also introducing reforms so developers and businesses can build their own grid connections where appropriate.

What the evidence actually says

It is worth being careful with the headline numbers, because 'powers 2 million homes' is a figure that deserves unpacking. Sea Link is not a power station. It generates nothing. It is a connection with a capacity of 2 gigawatts. The 'homes' figure describes how much electricity that capacity could carry, not how much will flow at any given moment. Cables carry what is being generated and needed; a quiet, still day looks very different from a windy one. The figure is a useful way of picturing scale, not a promise about output. The same caution applies to the solar numbers. 'Could power about 400,000 homes a year' is an estimate from the developer, and solar output in Britain varies enormously between a June afternoon and a December morning. Battery storage, as at Frodsham, is partly an answer to that, which is why it is increasingly built in. On bills, the Energy Minister's claim that this will 'bring bills down for good' is a political statement about a direction of travel, not a measured result. The mechanism described - fewer payments to generators who are asked to turn off - is real and well documented. Whether the total effect on a household bill is a reduction depends on the cost of building the network as well as the savings, and on many other things happening at the same time. Treat it as a reasoned argument, not a figure you can check next year. Finally, approval is not the same as construction. Reporting on the decision noted that development consent allows the scheme to advance but does not mean building can begin everywhere without further checks. Coverage put construction starting in early 2027, with completion scheduled for 2031, and noted that the Order comes into force on 23 November 2026. The decision is also contested locally. Around 17,000 people have signed a petition started by the Save Minster Marshes group, asking for the project to be paused so alternative sites for the Kent landfall can be researched. National Grid is providing community funds of over £1 million each for Kent and Suffolk, which could support community facilities, green spaces and local skills. A community fund is not an answer to an environmental objection, and it is worth not confusing the two.

Practical advice

This is national infrastructure, so there is not much an individual needs to do. But there are a few sensible things. **If you live near the route, look at the actual documents.** The route runs between Pegwell Bay in Kent and the Suffolk coast between Aldeburgh and Thorpeness, with roughly 122km of subsea cable and a total high-voltage route of around 138km. Local councils, including East Suffolk and Suffolk County Council, host project pages. Planning documents are long but specific, and they beat speculation. **Be sceptical of 'your bills will fall by X' claims in either direction.** Both supporters and opponents of grid projects quote bill figures confidently. Nobody can give you a reliable per-household number for a project finishing in 2031. **Do not expect anything to change at home.** Your electricity supply, your supplier and your meter are unaffected by this decision. If someone contacts you claiming you need to do something, or pay something, because of a grid project, treat it as a likely scam. **If you want to object or comment, find out what stage things are at.** The examination stage, where the public can make representations, has already happened for Sea Link. Further checks still apply before construction in some areas. Local authority planning pages will say what is open and what is closed. **For the solar sites, the detail is in the land use.** The Nottinghamshire scheme includes plans for about 4,000 sheep grazing among the panels, rising to 9,000 during lambing, 64,500 new trees, over 50km of hedgerows and 34.8km of new walking and riding routes. If you live nearby, those are the parts that will affect daily life most.

What to know

On 30 October 2026, the Department for Energy Security and Net Zero granted development consent for Sea Link, a 2 gigawatt undersea electricity connection between Suffolk and Kent, built by National Grid. The department says it can carry enough electricity to power about 2 million homes, and that it will ease grid pressure and cut payments made to generators asked to switch off. Two solar projects were approved the same day: Great North Road Solar and Biodiversity Park near Newark (800MW, estimated at about 400,000 homes a year) and Frodsham Solar in Cheshire with battery storage (estimated 40,000 homes). The government says 39 nationally significant clean energy projects have now been approved since July 2024. The cable runs roughly 122km under the sea, with a total high-voltage route of around 138km, between Pegwell Bay in Kent and the Suffolk coast between Aldeburgh and Thorpeness. Reporting puts construction starting in early 2027 and completion in 2031, with the Order coming into force on 23 November 2026. National Grid is providing community funds of over £1 million each for Kent and Suffolk. The scheme is opposed locally: around 17,000 people have signed a petition asking for a pause to research alternative landfall sites in Kent. Treat 'homes powered' figures as a way of picturing capacity rather than a promise of output, and treat claims about household bills as arguments rather than measured facts. Sources: GOV.UK (Department for Energy Security and Net Zero), 'Major undersea power cable given green light', 30 October 2026, https://www.gov.uk/government/news/major-undersea-power-cable-given-green-light; New Civil Engineer, 'DCO for National Grid's Sea Link subsea cable project approved by government', 30 October 2026, https://www.newcivilengineer.com/latest/dco-for-national-grids-sea-link-subsea-cable-project-approved-by-government-30-10-2026/; East Anglian Daily Times, 'Sea Link gets consent for 138km subsea electricity link', 30 October 2026, https://www.eadt.co.uk/news/26686201.sea-link-gets-consent-138km-subsea-electricity-link/ This article is for general information. It is not financial, legal or planning advice, and it does not replace advice from a qualified professional about your own property or circumstances.

#energy#electricity grid#infrastructure#solar power#planning#net zero

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