In 2002, the European Water Framework Directive came into force, compelling member states (including the UK at the time) to make sure that all freshwater bodies were in good ecological health by 2027.

Source: https://www.newscientist.com/article/2397002-londons-drying-rivers-threaten-the-citys-drinking-water-supply/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home

The WCP contributes to improving water quality and associated Water Framework Directive requirements by encouraging best practice near watercourses and raising awareness of local water quality issues for example, MCPA levels detected in watercourses.

Source: https://www.farminglife.com/business/the-water-catchment-partnership-ten-years-on-4176544