Thousands of people gathered in central London on Sunday to call for tougher action on keeping the UK's rivers and seas clean.
The March for Clean Water was advertised as a "one-off" event to petition the government to enforce laws that tackle water pollution and ensure "all polluting industries" upgrade infrastructure and reduce water wastage.
According to the Environment Agency, there were 3.6 million hours of spills in 2023 - more than double the total hours of spills in 2022.
Steve Reed, the environment, food, and rural affairs secretary, said he shared the "public's anger" and had taken "immediate action" to start tackling the "pollution scandal"