[1] [2] [3] Loch Lochy lies along the Great Glen of Scotland, at an altitude of 29m above ordnance datum (AOD).

The north-east slope of the summit forms the headwall of the Coire Glas, a horseshoe-shaped glacial corrie.

[3] In August 2024, the roughly 5 meter wide and 1.2 km long exploratory tunnel was completed, yielding geological insights for the main construction.

[6] A final investment decision will depend on UK government assurances about how the regulated electricity market would reward storage schemes.

[1] In March 2023, SSE announced plans to spend £100M in exploratory work, including drilling a tunnel 1km into the mountainside to assess the geology.