A £140m upgrade is carried out at Mogden Sewage Treatment Works in West London to extend sewage treatment capacity by 50 per cent.
Significantly reducing the amount of storm sewage that overflows into the tidal stretches of the River Thames will reduce odor at the site and benefit local wildlife.
Mogden will generate up to 40 per cent of its power requirements from renewable energy generated from 'poo power' - where electricity is generated by burning methane derived from sewage.
Completion due in 2013
Source: Thames Water website