HC Deb 23 March 1960 vol 620 c33W
42. Mr. Zilliacus

asked the Minister of Defence by what authority official information regarding a powerful nerve gas, developed in this country, has been supplied to the Defence Department of the United States of America.

Mr. Watkinson

Details of a British discovery relating to chemical warfare were passed to the United States authorities at the research stage under the arrangements for the exchange of defence information between the United Kingdom and the United States.