HC Deb 17 June 1971 vol 819 c133W
Mr. Wiggin

asked the Secretary of State for the Environment how many accidents have occurred on the M4 as a direct result of road works in connection with the construction of crash barriers.

Mr. Michael Heseltine

This information is not readily available and to obtain it would involve much valuable police time in a detailed analysis of the accidents occurring on the M4 since work on the barriers started.