I refer the hon. Member to the ministerial statement, 26 June 2007, Hansard, column 27WS, about the Ministerial Group on Gas Safety. The group is supporting cross-Government activity to raise awareness of CO poisoning from space and heating appliances burning fossil fuels and how it can be avoided. Appliances need to be properly installed and maintained in a safe condition by competent persons. An annual safety check is also recommended. CO alarms are advocated as a useful back-up precaution but should not be regarded as a substitute for these measures.