The former boss of the water regulator Ofwat has slammed Thames Water's plans for a £4 billion 'Super Sewer'.
The water company has submitted a 50,000 page planning application for the project, saying it's needed to ease the pressure on London's existing Victorian system.
But Sir Ian Byatt says the only reason the current network is in a bad state is because Thames Water hasn't maintained it properly.
From today you will be able to have your say about plans for the Thames Tideway Tunnel project. The 15-mile Super sewer is proposed to help tackle the tens of millions of tonnes of untreated sewage flowing into the tidal River Thames every year,
The capital's sewers were built 150 years ago and are in perfect working condition but they're struggling to cope with a population twice the size as the one they were built for.
Up to 50 tons of untreated sewage can be pumped straight into the Thames every second. Now Thames Water want to build a tunnel for the sewage which will see around £70 put on every customer's bill.