Tideway, the company building London’s ‘super sewer’ to clean up the River Thames, partnered with environmental charity Thames21 on a community programme to help tackle the scourge of plastic waste. Thames River Watch involves volunteers collecting data about the river’s litter pollution and its water quality. The plastic pollution issue is huge - in September 2017, 4,100 plastic bottles were removed from 19 sites in one day! The programme’s data was used in London Assembly Environment Committee calling on Sadiq Khan to take action. He subsequently announced an investment in water fountains to reduce the tide of plastic waste.