A power purchase agreement worth £440m covering the next 20 years has been signed by BT.
This will include the supply of around 100 MW of energy from three wind farms situated in Scotland, Wales and Lancashire.
The company has described the deal as a “vote of confidence in UK renewable energy” and a part of its commitment to source its electricity from renewable sources and reduce its carbon emissions.
The main part of the deal is accounted for by the Fallago Rig wind farm near Edinburgh, which involves a £300m spend by BT over the next 20 years.
It has also committed to a 15-year deal worth £100m with Mynydd Bwilfa wind farm in Wales.
A further £40m will be spent over 15 years with Heysham South Wind Farm in Lancashire.
The BT deals for the Wales and Lancashire sites are supporting their construction.