We're talking about the industry that just finished Thames Tideway, fully privately financed? A project that will last for at least 100 years and probably longer? A project that was needed for decades but was ignored by government and only got built thanks to the private sector?

The idea private companies don't invest is just Labour propaganda. Another commenter has already pointed out your belief about reservoirs is wrong, as is the idea they wouldn't make other forms of investment.

And all this has happened despite the government imposing socialist price controls on the industry, a move usually guaranteed to kill investment!