Southend getting 750,000 litres of underground water storage (to avoid floods) https://www.southend.gov.uk/news/article/3503/750-000-litre-flood-defence-to-protect-southend-seafront-businesses-as-better-queensway-works-accelerate #Southend
750,000-litre flood defence to protect Southend seafront businesses as Better Queensway works accelerate – Southend-on-Sea City Council
With works progressing at pace on the Better Queensway project, major infrastructure upgrades are now underway that will deliver substantial new flood protection for Southend’s seafront.