An investigation by ITV News Meridian has revealed that turbine blades at the world’s largest offshore wind farm off Kent have developed a fault.

Actress and activist Emma Thompson has even fronted a controversial Greenpeace campaign, claiming wind power costs have halved.

However, this video has since been removed from their website and social media sites.

Erosion repairs to the turbines could cost millions of pounds as the owners are forced to carry out emergency repairs to 140 of the turbines.

Critics of the so-called ‘green energy’ say it raises questions about whether wind power makes economic sense.

• Tony Green’s exclusive report can be watched below