Military Radar Concerns Slow Down UK Windfarm Projects

The UK government’s plan to increase renewable energy is facing a new challenge. In the last year, the Ministry of Defence (MoD) has officially objected to at least four planned windfarm projects. The MoD is concerned that the large, spinning blades of the wind turbines could cause what they call “unacceptable interference” with radar systems used to detect military aircraft. This means that if the turbines are built, they might accidentally hide planes from military radar screens, creating a serious safety risk.

One of the most prominent cases is the Hope Moor project in County Durham. According to The Guardian, the MoD sent a letter to planning authorities warning that the 23 planned turbines, which would reach heights of 200 meters, could result in aircraft not being detected within a specific military flight area. The government has labeled Hope Moor a “nationally significant project,” meaning the final decision on whether it can proceed rests with the energy secretary. This project is part of a larger government goal to double the UK’s onshore wind power capacity by 2030.

This situation highlights a growing tension between national security and the need for more clean energy. After the Labour government took power in 2024, it ended a ten-year ban on new onshore wind developments in England. However, the MoD’s recent actions have put them on a collision course with the Department for Energy Security and Net Zero (DESNZ). The DESNZ is responsible for pushing forward these green energy projects, but they must also respect the security warnings provided by the military.

Beyond the Hope Moor project, the MoD has raised alarms about other developments. These include a six-turbine farm near Driffield in East Yorkshire and a 13-turbine project near the Scottish borders. Furthermore, the ministry has expressed concern about an offshore windfarm in the Irish Sea. That project, which proposes an 87-turbine array, could interfere with aviation radar systems at the Warton Aerodrome base in Lancashire. These objections are not entirely new, but they are becoming a more frequent part of the planning process.

Industry experts suggest that these problems do not necessarily mean the end of these projects. According to The Guardian, there is a “well-trodden path to the negotiating table.” In many cases, developers can make minor adjustments to the size or height of the turbines to satisfy military requirements. Alexandre Davies, the head of aviation at the trade group Renewable UK, stated that the industry works closely with the MoD to find solutions, as they have done for many years, to ensure that projects can be delivered faster.

Despite this, the MoD’s warnings are being used by those who oppose the construction of windfarms. For example, the “Not One Moor” campaign, which is led by former England cricketer Lord Botham, has been active in opposing several projects, including Hope Moor, Scout Moor, Walshaw Moor, and Ray Fell. Local politicians have also joined the debate. Angus Thompson, a Conservative councillor in North Yorkshire, described the MoD’s warning as the “nail in the coffin” for the Hope Moor scheme, arguing that the project should be abandoned immediately.

In response to these concerns, a spokesperson for the DESNZ explained that the government works closely with the Ministry of Defence. They noted that all onshore wind projects must go through a rigorous planning process. This process is designed to carefully consider defence and security needs, alongside the views of local communities and the potential impact on the environment.

As the UK continues its push toward net-zero energy, the balance between security and sustainability will remain a key issue. While the MoD’s interventions are described by some as “routine,” they remain a significant hurdle for developers. Whether these projects can move forward will depend on how successfully the government and the wind industry can address these radar interference fears while still meeting their ambitious climate targets.