To ask the Secretary of State for Defence if he expects to receive information from his United States counterpart on the hydronuclear tests announced by the United States administration to be ordered at the Nevada test site in 1996. 
§ Mr. Arbuthnot
I assume the hon. Member is referring to US plans to conduct hydrodynamic tests which do not involve any nuclear yield. There are long-standing arrangements allowing for the exchange of nuclear weapons—related information between the US and UK where the two parties believe that it would be mutually beneficial.