HC Deb 24 June 1968 vol 767 c18
5. Sir J. Langford-Holt

asked the Minister of Technology what is the level of radioactive fall-out at present; how this compares with previous years; and how much is attributable to the Chinese tests carried out in the summer.

The Joint Parliamentary Secretary to the Ministry of Technology (Dr. Jeremy Bray)

The present levels of long-lived radioactive fall-out are similar to those of 1967. About half of the current long-lived radioactivity may be attributed to the Chinese explosion of 17th June, 1967.