Reported by 1 source

The short version

  • The Welsh government is consulting on a ban of steel pylons for new electricity lines up to 132 kilovolts, favoring underground cables or less intrusive wooden poles.
  • Developers warn that burying cables could increase project costs by hundreds of millions of pounds and delay the connection of planned wind farms to the national grid.
  • The policy aims to mitigate visual impact on landscapes and reduce risks to wildlife, while acknowledging higher installation and maintenance expenses associated with subterranean infrastructure.

The Welsh government has initiated a formal consultation process aimed at eliminating the use of traditional steel lattice pylons for new electricity transmission lines under its jurisdiction. This policy shift represents a significant departure from conventional grid expansion methods, as ministers propose burying energy cables underground or utilizing wooden poles that are deemed less visually intrusive. The move fulfills a specific pledge made by Plaid Cymru prior to the Senedd election in May, reflecting a political commitment to balancing necessary energy infrastructure development with the preservation of local landscapes and community amenity.

Under the proposed regulations, new overhead lines carrying up to 132 kilovolts would be prohibited from using large steel structures. Instead, the government intends to allow for wooden poles or equivalent low-impact infrastructure only if specific planning tests are satisfied. The primary justification for this transition is the reduction of visual pollution in rural areas and the protection of natural habitats. Officials argue that undergrounding circuits can shield wildlife, particularly birds, from collision risks and make the grid more resilient against severe weather events that frequently damage exposed overhead lines.

News Journal

However, the consultation document explicitly acknowledges the substantial economic trade-offs inherent in this approach. Burying cables is widely recognized within the industry as being significantly more expensive to install and maintain compared to overhead alternatives. The process also introduces greater construction impacts during the installation phase, potentially disrupting local communities for extended periods. These factors create a complex policy environment where environmental and aesthetic goals must be weighed against fiscal realities and engineering constraints.

The tension between these competing priorities is already evident in ongoing disputes involving Green Gen Cymru, an energy company planning major grid connections for onshore wind farms. The firm had proposed three significant power line routes connecting renewable energy sites in mid-Wales to the wider grid network in Shropshire and south-west Wales. These projects, which span Carmarthenshire, Ceredigion, Powys, and Shropshire, have faced fierce local backlash. Groups representing hundreds of landowners previously took legal action against the company, citing concerns over the visual and environmental impact of the proposed steel pylons.

Green Gen Cymru has consistently argued that undergrounding its cables would drastically increase project costs. The company estimates that subterranean installation would cost approximately 4.5 times more than running lines overhead. For the Towy Usk project alone, which links Carmarthenshire and Powys, this difference translates to an additional expenditure of roughly £500 million. Such a financial burden raises serious questions about the viability of these renewable energy projects under the new regulatory framework, potentially delaying or derailing investments that were projected to reach nearly £1 billion by 2030.

In response to community opposition, Green Gen recently unveiled a redesigned pylon intended to be more compatible with the Welsh landscape. Described as slim and compact, standing at 22 meters tall, this new structure was developed specifically to address aesthetic concerns raised by local residents and politicians. Despite these efforts to mitigate visual impact through design modifications, the government’s proposed ban suggests that even reduced-footprint steel structures may no longer be acceptable for new high-voltage lines under its control.

Adam Price, the Welsh Energy Minister, emphasized the need for infrastructure that is sensitively designed to minimize negative effects on both the environment and host communities. He acknowledged that changes in energy generation and usage require new grid capacity but stressed that this expansion must offer maximum benefits for Wales without compromising local character. The government’s stance indicates a willingness to accept higher costs and potential delays in favor of long-term landscape preservation and community acceptance.

The consultation period will remain open until January 15, 2027, allowing stakeholders including developers, environmental groups, and local authorities to submit their views. This extended timeline reflects the complexity of the issue and the need for thorough consideration of technical, economic, and social factors. As the debate continues, the outcome could set a precedent for how other regions approach grid expansion in sensitive landscapes, balancing the urgent need for renewable energy infrastructure with the desire to protect natural beauty.

If the ban is implemented, it will fundamentally alter the economics of grid development in Wales. Developers may need to seek alternative funding sources or reconsider project scopes to accommodate higher installation costs. Conversely, if the government opts for a more flexible approach that allows certain steel structures under strict conditions, it could ease financial pressures while still addressing some community concerns. The final decision will likely hinge on how policymakers weigh immediate economic impacts against long-term environmental and social benefits.

This policy development occurs against a backdrop of increasing pressure to accelerate the transition to renewable energy sources. While undergrounding cables offers clear advantages in terms of visual impact and wildlife protection, the associated costs and construction challenges cannot be ignored. The Welsh government’s consultation represents a critical juncture in determining how future energy infrastructure will be integrated into the landscape, with implications that extend beyond Wales to influence broader debates on sustainable development and grid modernization.

Sources behind this briefing

Go to the original reporting