Projects · Power & Grid
Pentir to Trawsfynydd, Gwynedd/Eryri (Snowdonia), North Wales; Glaslyn Estuary crossing at Porthmadog·In developmentPower & Grid
Pentir to Trawsfynydd Reinforcement
- StageTrawsfynydd substation works approved subject to conditions by Eryri National Park Authority (15 Jul 2026)
- Next milestoneRemaining planning decisions; construction start
- Last checked1 November 2026
What has changed on this project, and when
- Next milestone: Remaining planning decisions; construction start2 November 2026 · previously: Planning decisions; construction due to begin summer 2026; operational by 2030
- Stage: Trawsfynydd substation works approved subject to conditions by Eryri National Park Authority (15 Jul 2026)2 November 2026 · previously: Planning applications submitted; Pentir Substation cables approved by Cyngor Gwynedd, remaining applications awaiting LPA decisions; DESNZ consent application still to come 2026
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