The Kentish Flats wind farm comprises of thirty turbines, each towering seventy metres above the muddy brown waters of the Thames estuary. Together they cost £105 million to erect and produce an impressive 280 GWh of energy, which is estimated to produce enough electricity to power 70,000 households. The turbines are arranged in a grid of five rows with each spaced around 700 metres apart and take, up an area of ten square kilometres. The turbines kick in when the wind hits around 5 miles per hour but ironically have to cut out when it reaches fifty miles an hour – the top of their upper safety limit. Our poor little boat was making pretty slow going as we slowly approached and it didn’t take long before the Nik’s white North sail had literally become a spec in the distance.