The huge “supersewer” that will stop the vast majority of discharges of effluent into the Thames is 90% complete and will cost a total of £4.5 billion, an investor report revealed today.
The 15-mile tunnel will start diverting sewage away from the river next year and is expected to be fully operational by 2025 according to Tideway, the company behind the infrastruture. The latest estimate of the final cost is a 2% increase on the previous figure.
