IN Brief:
- SP Energy Networks is consulting on revised plans for the proposed Gala North substation in the Scottish Borders.
- The scheme includes 132kV air-insulated and 400kV gas-insulated infrastructure, with 400kV transformers housed onsite.
- A 1.25km diversion of the existing 400kV ZA overhead line would connect the wider transmission route into the new substation.
SP Energy Networks has opened further consultation on Gala North substation, a proposed transmission reinforcement project in the Scottish Borders.
The consultation runs from 8 June to 10 July 2026 and follows an earlier consultation held in June 2024. Revised proposals take account of feedback on access, visual impact, and the local setting. Community drop-in events are scheduled for Lauder Public Hall on 9 June and Blainslie Village Hall on 10 June.
The substation would be built around four kilometres south of Lauder, with the main substation footprint covering approximately six hectares. Additional land within the wider development boundary would be used for access, drainage, landscaping, screening, and construction requirements.
The electrical design combines two transmission voltage levels and two insulation approaches. Gala North would include 132kV air-insulated connections and 400kV gas-insulated connections, while the 400kV transformers would be housed within a building constructed on site. The use of gas-insulated equipment at 400kV supports a more compact layout than a fully air-insulated design at the same voltage.
The project also includes a proposed diversion of part of the existing 400kV ZA overhead line route between Cockenzie and Eccles. Approximately 1.25km of new overhead line, six towers, and two gantries would bring the existing route into the new substation, integrating the site into the wider transmission network.
SP Energy Networks has selected the proposed location because of its proximity to existing overhead line infrastructure, distance from nearby properties, and limited visibility from surrounding areas. Project documents and consultation materials are available through the Gala North project website.
Gala North forms part of a wider reinforcement cycle across central and southern Scotland, where renewable generation, regional demand, system resilience, and cross-border power flows are driving investment in transmission infrastructure. Substations such as Gala North are the physical interfaces that allow wider grid expansion to function, bringing together switching, transformation, protection, control, and overhead line integration.
The project also illustrates the practical complexity behind transmission policy. Grid expansion is often described through investment totals and clean power targets, yet delivery depends on site selection, civil engineering, equipment procurement, electrical design, route works, construction logistics, and operational handover. Local consultation sits within that engineering process because the infrastructure is large, visible, and long-lived.
At distribution level, UK Power Networks’ Sheerness primary substation upgrade shows a similar pattern of network reinforcement, with transformer capacity, switchgear, and underground cabling being added to support local demand growth. Gala North operates at a higher voltage and with a transmission role, but both projects sit within the same wider shift toward heavier electricity infrastructure investment.
Scottish transmission reinforcement is also closely linked to renewable energy delivery. The onshore infrastructure required for ScotWind projects has already begun moving through consent and development stages, including onshore grid works for the Caledonia and Buchan offshore wind projects. Cable corridors, substations, and grid interfaces are becoming as critical to renewable deployment as the generation assets themselves.
Gala North will now move through further consultation before any subsequent consenting and delivery stages. The engineering requirement is to strengthen a strategic transmission route with new switching, transformation, and overhead line infrastructure. The delivery process must align that requirement with community feedback, environmental assessment, construction access, visual screening, and long-term operation.