§ Mr. Hardyasked the Secretary of State for the Environment how many incidents have been recorded where sewer systems have proved defective or sewers have collapsed or revealed major defects due to age in each of the last three years in England and Wales.
§ Mr. Giles ShawDetailed records of all incidents are not kept, but investigations by the Water Research Centre indicate that the number of excavations to carry out repairs to collapsed sewers is of the order of 2,000 per year in England and Wales.