Development consent has been granted for Sea Link, a proposed high-voltage electricity connection between the Sizewell area of Suffolk and Richborough in Kent. The decision, dated 30 October 2026, allows the infrastructure project to move beyond the consent process, but does not mean the connection has been built or is supplying electricity.
The scheme combines subsea and onshore sections, with converter stations planned in both counties. The developer describes the full connection as 138km long. Its purpose is to provide additional capacity and flexibility on the electricity network, benefits that remain expectations for the proposed link rather than outcomes already delivered.
The distinction between approval and operation is important for a project of this scale. Consent is a decision about the proposed infrastructure; construction, completion and the eventual use of the connection are separate stages. Detailed planning remains ahead, alongside a period in which the decision can be challenged through the court.
Construction expected from early 2027
The company expects construction to begin in early 2027, subject to detailed planning, and anticipates completion by 2031. Those dates are its current expectations, not confirmation that work has begun or a guarantee of when the project will be finished. The consent announcement therefore sets out a next stage, rather than marking delivery of the connection.
For Suffolk and Kent, the proposed infrastructure includes more than the cable beneath the sea. Onshore sections and a converter station in each county also form part of the scheme. The approved project links the Sizewell area with Richborough through that combination of land-based and subsea infrastructure.
The developer has also outlined proposed supply-chain investment associated with the project. Such proposals should be distinguished from spending already made or activity already completed. The decision itself does not establish that anticipated investment has taken place, just as it does not establish that the expected network benefits have been achieved.
Six-week challenge window
The project is now in the post-decision stage. A challenge to the consent decision can be brought to the court within six weeks. That window is part of the position following approval; it is not evidence that a challenge has been lodged, nor does it establish what the outcome of any challenge would be.
With that period still relevant and detailed delivery planning ahead, the project’s status is best understood as consented infrastructure awaiting construction. The decision and the developer’s timetable describe different things: one records the approval granted on 30 October, while the other sets out expectations for work beginning and finishing in the years ahead.
The company says Sea Link is intended to increase the network’s capacity and flexibility. Those aims explain the proposed connection, but they should not be read as a statement that the network has already gained those benefits. At this stage, the link remains a project to be delivered between the two counties.
The consent grant is therefore a significant step in the scheme’s progress, with a clear geographical scope and an expected construction timetable. It is not an operational milestone. The next phase concerns detailed planning and the proposed start of construction, while the opportunity for a court challenge remains part of the post-decision process.
Sea Link’s immediate position is approval for the proposed connection, rather than completion of it. The company’s expectation is for work to start in early 2027 and finish by 2031, subject to the planning that remains ahead.
