asked the Secretary of State for Social Services if he has now studied the findings of the second national health and nutrition examination survey for 1977 to 1980 carried out by the United States public health service about the relationship between lead in petrol and blood lead levels; and if he will make a statement.

The most recent report of the survey concludes that it does not allow the relationship between blood lead levels and lead from petrol, or any other source, to be determined, but that there was a close similarity between decreases in blood lead levels and the use of lead in petrol.