Vineyard Wind – the first commercial-scale US offshore wind farm – marked another big milestone for the sector as construction at sea began with work to lay its twin export cables, ahead of turbine installation next year.

Developer Vineyard Wind – a joint venture between Iberdrola’s Avangrid and Copenhagen Infrastructure Partners – said Italy's Prysmian had begun installing the cables at the lease site 15 miles (24km) south of Martha’s Vineyard in Massachusetts, with work continuing for around 18 months.