UK utility SSE took a £57m ($67.8m) hit buying high-priced power as a result of delays to its 1.1GW Seagreen offshore wind project off Scotland, the company said.

The £3bn Seagreen – which SSE is building in the North Sea with co-owner TotalEnergies – is set to become Scotland’s largest when fully complete, expected in the summer of next year.

The utility said when presenting half year results to the end of September that power production at its SSE Renewables unit was 500GWh, or 13% “behind planned levels due to unfavourable weather and delays to the Seagreen construction project which is now expected to complete in summer 2023”.