I thank the hon. Member for the tone of what he asked. About 160 local authorities have supplied information about their assessment of the number of houses which are below the tolerable standard. The remaining authorities are, generally speaking, the smaller authorities who may not have such big problems as the major authorities. I agree that it is necessary for all authorities to make the fullest possible assessment of houses falling below that standard. We have taken a large number of measures to make it more attractive and easier for authorities with these houses to eradicate the problem.