§ Mr. Greville Janner
asked the Secretary of State for Transport (1) what progress he has made in his inquiries on the sealing abilities of the various preparations being offered for sale as tyre sealants and their effect on the materials and structure of tyres; and whether he will make a statement;
(2) when he hopes to publish his Department's investigations into the effects of sealants on tyre materials and structure; and whether he will make a statement.
§ Mr. Kenneth Clarke
Our tests so far have not shown any relationship between the use of tyre sealants and premature tyre failure. It will take a few more months to complete our full test programme.