Interesting follow-up. On my part my expertise is not in finance so I can't make the kind of analysis you guys can. I follow politics and I found this which is from Dame Angela Eagle (Labour for Wallasey) in Hansard debated on 28 June of this year:
When they were privatised, water companies had all the debt written off, so they started with zero. Since then, they have borrowed £53 billion, much of which has been used to help pay £72 billion in dividends. The investment has been made by borrowing and putting it on to customers’ bills. Now, the ratings agency S&P has negative outlooks for two thirds of the UK water companies it rates, because they are over-leveraged and took out too much debt in an era of low interest, which they now have to pay back. This is not a triumph but a huge problem for the resilience of our water industry. What will the Minister do when water companies start falling over?
Khalid Mahmood (Labour for Perry Barr) added:
...funding and loans to the water companies are a huge issue, as that is where they have paid their dividends from. On shareholders, we have foreign investors taking huge amounts of money away from this country, and we need better fund managers who are able to assess where they put their money. They should be held accountable, too.
Ofwat has not been doing what it is supposed to do. I believe that the chief executive of Ofwat applied for a job at Thames Water. That shows what the companies are doing and how Ofwat works with them—rather than scrutinising them, people are looking for the next job.
Claims like this do not signify guilt but it all looks as dodgy as one might expect especially in terms of asking where's the money gone as it ain't gone on infrastructure, reasonable bills and safeguarding of clean water and the environment.