The Government Says

Continuous Water Quality Monitoring Programme (Interim technical Standard) - EIR2026/03894

Continuous Water Quality Monitoring Programme (Interim technical Standard) - EIR2026/03894
Local copy of EIR2026_03894___Response__Redacted.pdf
Local copy of Annex_C_-_CWQM_Interim_Technical_Standard.pdf

https://www.gov.uk/government/publications/continuous-water-quality-monitoring-programme-interim-technical-standard-eir202603894

seen at 09:38, 18 March in Transparency and freedom of information releases.