Experts are calling for immediate steps to tap into the tidal energy potential of the Severn estuary, suggesting that smaller lagoon projects should be prioritized over a large-scale barrage. The Severn Estuary Commission, established in 2022, advocates for these lagoon models as a way to generate consistent, renewable electricity that isn't dependent on weather conditions.
The commission, led by Dr. Andrew Garrad, who was recently honored with the Queen Elizabeth Prize for Engineering, emphasizes the dual importance of renewable energy potential and environmental preservation. Dr. Garrad highlighted the growing demand for electricity due to the rise of electric vehicles, the electrification of heating and industry, and the expansion of data centers. He stressed the need for immediate action to utilize natural resources while reducing carbon emissions.
Comprising experts from various fields, the commission was initiated by the Western Gateway "powerhouse," which includes leaders from politics, business, academia, and the public sector, covering a region from Swansea to Swindon. The commission was formed as energy security became a pressing issue following the Russian invasion of Ukraine. Over the past year, it has consulted with numerous stakeholders to assess the feasibility of harnessing the UK's largest tidal range, which could potentially supply up to 7% of the nation's electricity needs.
In its final report, the commission advised against pursuing a large barrage due to environmental concerns, legal challenges, and potential disruptions to ports and commercial activities. Instead, it recommended supporting a lagoon project, which would have a smaller environmental footprint and could be backed by the UK and Welsh governments.
The UK's National Energy System Operator already anticipates that tidal energy will be a crucial component of future energy systems. The Severn estuary, with one of the world's highest tidal ranges, could significantly contribute to the UK's tidal energy supply while maintaining its environmental significance.
The Welsh government has already expressed support for these recommendations. Sarah Williams-Gardener, chair of the Western Gateway, emphasized the urgency of capitalizing on this opportunity, noting that a lagoon project could not only provide reliable renewable energy but also contribute up to £12 billion in gross value added to the UK economy and create 220,000 job years during construction.