Water investors have withdrawn billions, says research
Critics blame under-investment for sewage spills and water leaks.
Water companies plan to raise household bills by 33% over the next five years to fund improvements.
The University of Greenwich claims water companies have invested less than nothing and are exploiting customers.
The research examined the accounts of top water and sewage companies, showing a £5.5bn decline in shareholder investment after adjusting for inflation since 1989.
https://www.bbc.co.uk/news/articles/cw4478wnjdpo