Wrapping up the interview, our political editor Beth Rigby asks Sir Keir Starmer what the government should be doing to respond to the deepening Thames Water funding crisis.
Sir Keir said he was "very concerned" by the situation, "as anybody who is a customer will be".
"It's for the government in place at the moment to look at this and make sure that Thames Water is viable and provides the water that people need," he said.
He said that should Labour win the next election, they will look at this issue themselves, adding "I would have accountability to the top of these organisations".
Thames Water has refused to rule out bill increases of up to 40% for customers as the troubled company tries to secure its future (more here).
It comes as the business, which serves nearly a quarter of the UK's population, struggles with more than £15bn of debt and the huge interest payments required to service it.
When asked earlier about the prospect of 40% bill increases, Levelling Up Secretary Michael Gove said the "leadership of Thames Water has been a disgrace" (more here).
The leadership team should "ask themselves why they're in this difficult situation, and of course the answer is because of serial mismanagement, for which they should carry the can".
Asked if the government could take Thames Water into special administration, the senior minister replied that the decision is one for Environment Secretary Steve Barclay.
"But I don't think we rule anything out," he added.