HC Deb 18 April 1957 vol 568 c236W
Mr. Bellenger

asked the Minister of Defence what knowledge he has as to the extent of the fall-out caused by recent Russian nuclear tests and, in particular, whether it would have reached as far as Japan.

Mr. Sandys

It is to be expected that some radioactive particles released by Russian tests would reach Japan. There have, in fact, been reports in the Japanese Press of radioactivity attributed to these tests.