Sources for numbers:
www.theguardian.com/environment/...
www.london.gov.uk/who-we-are/w...
www.theguardian.com/business/202...
theguardian.com
New campaign urges public to reduce water use as UK emerges from heatwave
Exclusive: £75m publicity drive will ask people to treat water as precious resource and cut daily use by 28 litres