At present, four out of the 21 valves in the system are operational, effectively channeling sewage flows into the super sewer.

Early data reveals that the tunnel successfully captured nearly 600,000 cubic meters of wastewater in just one day following recent heavy rainfall.

This ambitious 15-mile underground system is currently in partial operation and is expected to be fully operational by 2025.

The construction of the tunnel took eight years and involved approximately 40 million working hours.

The tunnel, which measures 7.2 meters in width, descends from 31 meters underground in Acton to 66 meters at the Abbey Mills Pumping Station.

Once fully operational, the tunnel will boast a storage capacity equivalent to 600 Olympic-size swimming pools, significantly mitigating sewage pollution in the river.

Concerns over sewage pollution have been heightened, as sewage was discharged into the River Thames for over 1,900 hours in the first quarter of this year.

Andy Mitchell, CEO of Tideway, emphasized that the project is already demonstrating tangible results in cleaning up the tidal Thames.

In a related issue, Thames Water faced a £104 million fine from water regulator Ofwat in August for poor management of wastewater treatment.

A £4.5 billion 'super sewer' project, known as the Thames Tideway Tunnel, has been launched in London to combat pollution in the River Thames.