Thames Water will soon be 100% powered by renewable energy, after inking a five-year, £520m supply deal with Drax-subsidiary Haven Power
The deal has an option for two further five-year renewals which could increase the overall value of the contract to more than £1.5bn over 15 years.
Thames Water - the UK's largest water and sewerage company - currently sources about 20% of its electricity through self-generated renewables.