A river campaign group has unveiled a new billboard, criticising Thames Water for discharging sewage.

Dubbed the ‘Pooster,’ the 48 sheet billboard launched by River Action, is constructed from fake £50 notes, stained brown with sterilised manure and mixed with water from polluted beaches, rivers and streams across the UK.

The ‘Pooster’ displays a caption: “This money is stained with crap, just like water company profits’.