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Planning

White Horse Reservoir Updates – Spring Newsletter and Clay Compaction Trial Summary Report

The May update from Thames Water regarding the White Horse (SESRO) Reservoir.

Published: 11 May 2026

Graphic showing the scale of the new reservoir compared to the surrounding area.

As we move into the month of May we are pleased to share the Spring edition of our reservoir newsletter Reservoir News – your source for the latest information about Thames Water’s proposal to build a new reservoir in Oxfordshire Latest news – Thames Water Strategic Resource Options

This edition provides an update on our continuing programme of site surveys, which will help us to build a comprehensive understanding of the site.

Please email us if you would like further information about how you can request printed copies of the newsletter. Alternatively, you can also find a digital copy of the newsletter on our website: www.thames-sro.co.uk/news Additionally, if you have any questions or topics you would like us to cover in the Reservoir Newsletter in the future, please contact our Engagement Team via email: whitehorsereservoir@thameswater.co.uk

We have also published our Clay Compaction Trial Summary Report which follows the embankment trials carried out last year, where we built three test embankments to test clay suitability and strength. You can find out more about this on our website White Horse Reservoir Clay Compaction Trial – Summary of Findings April 2026

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