My hon. Friend is quite right to express the huge local concerns. He and I have spoken multiple times a day since this issue arose, and he has been extremely effective in raising the concerns of those he represents.

There is recognition that the initial comms, the mishap with some of the leaflets and the comms about compensation are all areas that South West Water will address moving forward, having sought to take his feedback. He is right about the urgency in addressing the Hillhead reservoir for the remaining 15% of the population. That is certainly uppermost in my conversations with the relevant stakeholders.

With regard to an investigation, issues with drinking water are treated with the utmost seriousness within Government, so I can assure my hon. Friend that these issues will be looked at extremely closely. I spoke with the chief executive of the Drinking Water Inspectorate at the weekend, and I had a meeting with one of its senior leaders just before this UQ. I can assure my hon. Friend that there will be a thorough investigation, as there always is with these kinds of issues, and I urge all parties, including South West Water, to co-operate fully and in a timely fashion.