Question to the Department for Environment, Food and Rural Affairs:

To ask His Majesty's Government what assessment they have made of the proposals for pumping water from the River Severn to the River Thames for use in South-East England.

The Severn to Thames Transfer is part of the RAPID programme and this means it will receive regulatory oversight as the owners (Severn Trent Water, Thames Water and United Utilities) continue to investigate and develop this potential strategic regional option (SRO). The Severn to Thames Transfer progressed through gate two in June 2023 after it was assessed by the RAPID partner regulators (Ofwat, EA and DWI). It was decided that this SRO should continue to be developed towards gate three.

The Severn to Thames Transfer is not currently a preferred option in water companies' water resource management plans (WRMPs). However, at PR24 Ofwat decided that the Severn to Thames Transfer should continue to be developed. This is because securing our future water supply is of critical importance, and therefore it is crucial that there is contingency within the system.

In the event that the Severn Thames Transfer is progressed, it is likely to involve a pipeline connection of the River Severn to the River Thames to enable the transfer of up to 500Ml/d raw water to the Southeast during times of drought.