We are developing proposals for Grimsby to Walpole, a 140 km overhead line with substations between northeast Lincolnshire and north Norfolk. As part of these plans, we are proposing to develop two new high-voltage substations at Weston Marsh, near Spalding.Grimsby to Walpole is needed as the existing network does not have enough capacity to securely and reliably connect and transport new sources of more affordable homegrown energy to homes and businesses.These proposals form part of The Great Grid Upgrade, the largest overhaul of the grid in generations. It will help prepare the grid for increasing electricity demand and help deliver greater energy security for Britain.In summer 2025, we consulted on our detailed plans for Grimsby to Walpole. The proposals were divided into seven Route sections. At the time, we did not have detailed proposals for Route section 5 as we were still considering whether one or two substations were needed at Weston Marsh.Following consideration of feedback, along with further technical work and continued engagement with generators, we are pleased to present our updated proposals for two new substations, Weston Marsh Substation A and Weston Marsh Substation B. These will be included in our development consent order (DCO) application. We have also outlined plans to deliver part of Weston Marsh Substation A earlier than the rest of Grimsby to Walpole to connect Outer Dowsing Offshore Wind. We would also welcome your feedback on this. The Weston Marsh targeted consultation is open from 12 noon on Tuesday 18 November 2025 until 11:59pm on Friday 19 December 2025.Why your feedback mattersConsultation is an important part of the planning process, as it enables everyone to comment on our proposals. Feedback from our consultations - along with the outcome of technical assessments and environmental surveys - helps us to develop our proposals before we submit our planning applications.
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