Photo by Woody Wan

Chancellor Rachel Reeves has announced sweeping reforms to protect offshore wind farms, power stations and other critical clean energy projects from legal challenge, in a move that could significantly accelerate the consenting of new marine renewable infrastructure around the UK’s coastline.

Under proposals published by HM Treasury on 20 May, Parliament would be empowered to designate and approve the most important clean energy projects as being of “Critical National Importance” (CNI). Once designated, those projects would be protected from judicial review on all but human rights grounds, a significant shift in the legal landscape for offshore wind developers who have long faced costly and time-consuming court challenges.

The case for reform

The government points to a pattern of meritless legal challenges that have driven up costs and delayed nationally significant projects. Of 167 Development Consent Order decisions made since 2008, just six were quashed following a challenge, yet many more failed processes cost developers, taxpayers and the economy substantial sums in delays and wasted time.

A Treasury spokesperson set out the Chancellor’s position plainly: “For too long, vital infrastructure delivery has been delayed by judicial reviews of projects the country needs. The Chancellor won’t stand for it any longer and is bringing forward bold changes to support delivery. She is clear that Parliament must take back control – to get Britain building the power plants, wind farms and grid connections that will bring bills down, strengthen our energy security, and deliver growth in every part of our country.”

The CNI designation would apply exclusively to clean energy projects, reflecting the government’s priority to reduce the UK’s dependence on fossil fuel markets. For other nationally significant infrastructure – including transport and water projects – a separate fixed legal challenge window would be introduced. Once that window closes, planning consent could be updated to address any legitimate issues, and no successive challenges could be raised at a later stage.

The reforms build on the Planning and Infrastructure Act, passed in late 2025, which already reduced the number of attempts a claimant can make to bring a legal challenge from three to one for meritless claims.

Industry welcomes the move

The announcement drew broadly positive reactions from the energy sector. Martin Pibworth, chief executive of SSE, one of the UK’s largest renewable energy developers, said the reforms addressed a direct drag on the energy transition. “Speeding up clean power and grid projects matters for one simple reason. It brings bills down. The faster we electrify heat and transport with homegrown electricity, the less exposed we are to volatile global fuel markets. Every stalled windfarm or grid upgrade means families remain more exposed to gas prices we don’t control.”

Dhara Vyas, Chief Executive of Energy UK, welcomed the announcement while noting the need for balance: “Planning reform for clean energy is critical and still needs to strike a balance between a process that allows proper scrutiny of applications without unduly restricting the country’s ability to build the infrastructure necessary to strengthen our energy security, boost our economy, and help stop energy bills being at the mercy of global events. Judicial Review will still have a vital role to play but in its intended purpose of ensuring the right legal process has been followed, rather than to re-examine the whole application again.”

Lord Banner KC, who authored an independent review into legal challenges against nationally significant infrastructure projects, described the proposals as a “further bold step”: “It was however clear from the many people I spoke to in the course of that work and since that there is a strong case for going further if we are to meet the scale of our infrastructure challenge. These proposals, which draw on the democratic mandate of the legislature, are a further bold step, and I look forward to supporting their development ahead of the government bringing forward legislation.”

Implications for offshore wind

For the offshore wind sector specifically, the reforms arrive at a critical moment. Analysis by Cornwall Insight found that the energy capacity of new battery, wind and solar projects approved in 2025 climbed to 45GW, 96% higher than in 2024. However, the pace of projects actually starting up lagged significantly, largely due to grid connection delays and long construction timelines compounded by legal uncertainty.

The reforms also extend to smaller energy projects, which would gain the right to apply directly to the Planning Inspectorate rather than going through local councils first, a change likely to benefit offshore grid connection infrastructure and coastal substations in particular.

The reforms apply to England and Wales only. Planning decisions in Scotland and Northern Ireland remain devolved matters.

Wider reform context and stakeholder concerns

The Treasury paper sits within a broader “Getting Britain Building” agenda, which has drawn a more cautious response from conservation and fishing organisations. The Wildlife Trusts and the RSPB jointly criticised the related Planning and Infrastructure Bill in May 2025, calling for its nature recovery provisions to be removed and citing the Office for Environmental Protection’s view that the Bill would cause environmental regression. RSPB Chief Executive Beccy Speight has argued more broadly that ministers risk being “simplistic and divisive” in pitting growth against nature.

The same tension has been visible in the marine reform agenda. When the Chancellor announced in January 2025 that new Marine Protected Areas would be designated to compensate for impacts from up to 16GW of offshore wind, Speight described the MPA move as a “positive step” but cautioned that some announcements that day put climate targets at risk. The RSPB backs offshore wind as essential to tackling climate change but argues it must not come “at any cost,” warning in evidence to Parliament that poorly planned development can cause population-level harm to seabirds, and pressing for important sites to be ringfenced and for better environmental data so the need for compensation is reduced at source.

The Marine Conservation Society was more critical of the accompanying Marine Recovery Fund, arguing its narrow focus on compensating damage would limit its effectiveness for recovery.

The fishing sector raises a different concern: the National Federation of Fishermen’s Organisations has acknowledged that a strategic, nationwide approach to compensation could be sensible, but warns it risks detaching environmental harm from the company responsible, and that habitat schemes and exclusion zones may compound the displacement of fishermen, particularly small inshore boats, from traditional grounds.