My Lords, the noble Lord, Lord Harris, put his finger on a really worrying thing about our infrastructure. For about 15 years, I have been worried about the water supply: the large and small reservoirs, the pipes that connect them and, of course, the water treatment plants. I worry that there is sometimes confusion between the Home Office, Defra and others about who is looking after security. One simple question the Minister may want to ask is what the police response rate to alarms is, because it can be a testing of the system as well as a false alarm, or a proper alarm about people entering certain premises or doing something to the water. It needs to be higher in the priorities than it presently appears.