Known as the Aspenfield windmill, the turbine is a medium sized model at just 50 metres to the hub, but it will generate almost 2 million units (kWh) of electricity every year, powering the equivalent of around 500 average UK homes annually.

Dale Vince, Ecotricity founder, said: "We’ve had a great start to 2014 – more and more people are joining Ecotricity, particularly after we froze energy bills until April, and we’ve now reached 100,000 customers on contract. The more people that join us, the more we can invest in building new sources of green energy – what we call our Bills into Mills model.

"Getting approval for this windmill near Kettering is a great example of that Bills into Mills model in action. We currently generate around 40% of our electricity from our own windmills and we have projects in planning that will more than double our capacity."

The Aspenfield windmill will save around 850 tonnes of C02 being pumped into the atmosphere every year.