- The government has discharged the air defence radar condition attached to the Norfolk Vanguard offshore wind consent.
- The decision removes a potentially serious obstacle, but is not itself a final investment decision or construction approval for every remaining project element.
- Resolving radar interference is increasingly important to the UK’s ability to expand offshore wind without compromising national security.
The UK government has discharged a critical air defence radar requirement for the Norfolk Vanguard offshore wind development after the project companies reached mitigation agreements with the Ministry of Defence.
The Department for Energy Security and Net Zero confirmed last week that Requirement 13 of the Norfolk Vanguard development consent order had been satisfied. The condition prevented any project turbine from operating until ministers, following consultation with the MoD, were satisfied that adverse effects on military surveillance would be mitigated throughout the wind farm’s life.
Norfolk Vanguard East Limited and Norfolk Vanguard West Limited entered formal Air Defence Radar Mitigation Scheme agreements with the MoD on 29 July. The Defence Infrastructure Organisation recommended discharge of the condition on 20 August.
The MoD concluded that compliance with those agreements would secure the necessary performance criteria before the turbines become operational and protect the air defence radar at Remote Radar Head Neatishead.
The two-page decision letter says the approved mitigation must subsequently be maintained for the operational life of the development.
Legal milestone
Modern offshore turbines can produce radar reflections that resemble moving aircraft, obscure genuine targets or otherwise degrade surveillance data. The problem grows as turbines become taller and offshore arrays cover larger areas.
For that reason, air defence objections have become a material constraint on parts of the UK offshore wind pipeline. The MoD will support projects only where it is satisfied that mitigation preserves military capability. In April, defence minister Luke Pollard told Parliament that no affected wind farm would be approved without safeguards “firmly in place”. The parliamentary response said new radar solutions had met the department’s requirements.
The specific technical and commercial details of the Norfolk agreements have not been published. Earlier project documentation considered measures such as radar data processing, blanking affected areas and requiring aircraft transponders within designated airspace. The legally important point is that the MoD now regards the contracted scheme as capable of meeting its requirements.
RWE’s current Vanguard East and West configuration is planned at almost 3 GW. The two projects secured 20-year Contracts for Difference in Allocation Round 7, within awards totalling 3.1 GW, at an inflation-linked strike price of £91.20/MWh in 2024 money.
RWE has agreed for KKR to acquire a 50% stake in each project and has been seeking non-recourse project debt. The company previously targeted partnership completion, financing and final investment decisions during summer 2026, with Vanguard West expected to commission in 2029 and East in 2030. RWE’s CfD announcement said the two wind farms could supply electricity equivalent to the consumption of around three million UK homes.
Vestas has firm agreements to supply each project with 92 of its 15 MW V236 turbines. RWE has also selected Lowestoft’s Eastern Energy Facility as a construction and commissioning base.
The radar discharge represents the removal of a material legal and technical dependency from an otherwise advanced project. It does not, on its own, confirm financial close, a final investment decision or completion of every other consent requirement.
Its wider significance lies in demonstrating that offshore wind development and air defence surveillance need not be treated as mutually exclusive. As the government seeks a much larger offshore fleet, repeatable mitigation arrangements will be required across several radar regions.
A solution that must be negotiated separately for every wind farm will add cost and uncertainty. Shared radar infrastructure, common technical standards and earlier coordination between developers and defence authorities could instead turn national security mitigation into a predictable component of project development. Norfolk Vanguard now provides an important test of whether those agreements can move successfully from legal approval to reliable operation.
