Work is due to start on a new wind turbine at the RSPB's headquarters at Sandy in Bedfordshire.
The turbine is 100 meters tall so needs to be transported to the RSPB on eight lorries. It could take about two weeks to put up, depending on the weather.
The turbine is expected to generate about two million units of green energy each year, which the charity says is equivalent to half the electricity it uses across all of its 27 locations in the UK.
The world's biggest offshore wind farm has been officially opened by the Prime Minister.
The London Array is situated 12 miles off Clacton in Essex. The £1.8 billion windfarm covers 95 square miles and can create enough energy to power three quarters of the homes in Essex.
The project is being hailed as good for jobs, particularly after claims the East could produce up to 75% of the country's energy supply in the future.
But there are some that say it's not so good for taxpayers, with critics claiming green energy will cost each household more than £600 a year by 2020.
Click below to watch a video report from ITV News Anglia
David Cameron said Britain is a "great place to invest" as he heralded the opening of the world's largest offshore wind farm close to the coast of Essex.
Mr Cameron described London Array, in the outer Thames Estuary, as a "big win for Britain" which proves the country is capable of delivering large-scale projects.
The Prime Minister spoke at the inauguration of the fully functioning wind farm which reached full capacity earlier this year with the commissioning of its 175th and final turbine.
All of its turbines export power to the national grid and could produce enough green electricity to power nearly half a million homes a year.
The Prime Minister has officially opened the world's biggest offshore windfarm.
The London Array covers 245 square kilometres and is situated 12 miles off the Essex coast. It's hoped it will bring jobs to the East.
The official opening comes on the same day that a new £11m energy sector training centre is set to be built in Great Yarmouth.
Click below to watch a report from ITV News Anglia's Malcolm Robertson
The Prime Minister David Cameron has opened a huge new wind farm off the coast of Essex.
The London Array is described as the world's largest offshore wind farm. It has 175 wind turbines and can generate enough power for 500,000 homes.
Campaigners have been fighting a High Court case to stop a windfarm being built close to an Elizabethan landmark in Northamptonshire.
Developers want to put up four wind turbines within a mile of Lyveden New Bield in Sudborough, but opponents argue they would spoil the landscape
They say if they lose, the protection of other important historic sites around the country could be undermined. Claire McGlasson reports