Water companies have been accused of abusing their monopoly position to overcharge customers by failing to provide the quality of service for which they were paid. Fideres, a consultancy specialising in the investigation of corporate wrongdoing, suggested water companies in England and Wales may owe consumers £163 million in damages for sewage spillages over the last six years. The firm said they may have also overcharged customers by £1.1 billion for sewage removal services they did not provide.