§ Mr. Frank Allaun
asked the Prime Minister to what extent the increased rate of radioactive fall-out is due not to wrong estimation of the residence time of radioactive dust in the stratosphere but to this stratospheric reservoir of strontium 90 being greater than the military scientists estimated; and if he will make a statement.
§ The Prime Minister
I would refer the hon. Member to paragraph 7 of my statement of 28th April, which gives the most likely explanation for the increased rate of fall-out.