A landmark decision by the High Court in Northern Ireland has put major road projects under new scrutiny, with the long-awaited upgrade of the A5 road now on hold. The court ruled that the proposed improvements to the A5—a vital route connecting Londonderry to Aughnacloy—did not provide enough evidence that they would comply with Northern Ireland’s strict climate change laws. This decision not only impacts the A5 but also sets a new precedent for how big infrastructure projects across the country will be judged in the future.
The A5 is one of Northern Ireland’s most important roads, running 58 miles (94 km) from Londonderry, through towns like Strabane and Omagh, all the way to Aughnacloy near the border with the Republic of Ireland. It’s a crucial link for commuters, businesses, and tourists, connecting Northern Ireland to County Donegal and Dublin.
For years, local residents, politicians, and road safety campaigners have called for the road to be upgraded. The A5 is notorious for its high accident rate, with more than 50 people losing their lives in crashes since 2006. The proposed upgrade was meant to make the road safer by widening it, improving junctions, and adding new sections.
Why Did the High Court Stop the Upgrade?

The decision to halt the A5 upgrade came after a legal challenge by the Alternative A5 Alliance, a group concerned about the environmental and social impacts of the project. The group argued that the Department for Infrastructure had not done enough to show how the project would fit with Northern Ireland’s new Climate Change Act, which became law in 2022.
The judge, Mr Justice McAlinden, agreed. He said that the department had relied on “aspirational assumptions” rather than solid evidence to prove the project would not harm efforts to cut greenhouse gas emissions. The court also found that the government had not properly considered the concerns of people living along the route, including issues related to human rights and fair compensation for landowners.
What Does This Mean for Farmers and Landowners?
The delay is causing frustration and hardship for many farmers and landowners along the A5. Some have not been able to use their land since last October, as the government has already started buying up property for the project. More than 330 farmers are affected, and many feel they are not being treated fairly.
John McClenaghan, deputy president of the Ulster Farmers’ Union, spoke out about the situation:
“If farmers are to be displaced, they should receive fair compensation. We must proceed with enhancing the A5 road, and we do not oppose that—but this process has dragged on for far too long. Farmers have a deep emotional connection to their land, and this uncertainty is causing real stress.”
Northern Ireland’s Climate Change Act, passed in 2022, sets a legally binding target for the country to reach net-zero greenhouse gas emissions by 2050. This means that every government department must now show how their projects and policies will help cut emissions. The Act also requires departments to work together to make sure their plans fit with the overall goal.
The court’s decision highlights the importance of these laws. It sends a clear message: big projects like the A5 upgrade must now be planned with climate change in mind, and the government must be able to prove that they will not make it harder to reach net-zero.
What Happens Next?
The Infrastructure Minister, Liz Kimmins, called the court’s decision “extremely disappointing” but said she remains committed to making the A5 safer. The judge made it clear that the project could still go ahead if the government fixes the problems and provides the necessary evidence.
However, experts warn that this could take a long time. Wesley Johnston, a well-known roads expert, said:
“It is likely to take years rather than months to assemble the technical evidence needed to support the scheme in anything like its current form.”
This means the A5 upgrade could be delayed for several years, and the government may have to rethink some of its plans. Other road projects and even policies in areas like agriculture could also face similar challenges in the future.
How Will This Affect Other Projects?
The court’s decision is not just about the A5. It sets a new standard for all major infrastructure projects in Northern Ireland. From now on, any big project—whether it’s a new road, a housing development, or an agricultural scheme—will have to show how it fits with the country’s climate targets.
This means government departments will have to work much more closely together, and ministers will have to be more transparent about the trade-offs that might be needed to reach net-zero. Some projects may have to be changed or even cancelled to make room for others that are more climate-friendly.
Community Voices: What Do People Think?
Local residents and business owners have mixed feelings about the delay. Many are frustrated that the upgrade, which was meant to make the road safer, is now on hold. Others, however, support the court’s decision, saying it’s important to protect the environment and make sure the government follows the law.
One local resident, Mary O’Neill, said:
“We all want a safer road, but we also want a cleaner, healthier environment for our children. If that means waiting a bit longer, then so be it.”
Quote of the Day
“If farmers are to be displaced, they should receive fair compensation. We must proceed with enhancing the A5 road, and we do not oppose that—but this process has dragged on for far too long. Farmers have a deep emotional connection to their land, and this uncertainty is causing real stress.”
— John McClenaghan, Ulster Farmers’ Union
The High Court’s decision to halt the A5 upgrade is a turning point for Northern Ireland. It shows that climate change laws are now a central part of how the country plans its future. Big projects must be carefully thought out, with clear evidence that they will help, not harm, efforts to cut emissions. For the people who use the A5 every day, the wait for a safer road continues. But the message from the court is clear: the future of Northern Ireland’s roads—and all major projects—will be shaped by both safety and sustainability. The government must now work harder to balance the needs of people, the economy, and the environment.
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