Cargo-ship owners and yachting groups fear the turbines, which will in some cases be more than 600ft tall, will pose a navigation hazard in already-busy stretches of water, according to a report in The Daily Telegraph.

They claim that diverting large cargo ships and tankers around wind farms will lead to an increase in carbon dioxide emissions from heavy shipping, which would cancel out much of the carbon dioxide savings that wind farms are intended to deliver.

There is also research that suggests such large structures cause interference to ships’ radar, making it hard to spot other craft.

Ian