§ Mr. Llew Smith
To ask the President of the Board of Trade what quantities of osmium-187 exist in the United Kingdom; what licensing arrangements cover its import and export; and what is the current market price per kilogramme of osmium-187. 
§ Mr. Oppenheim
Osmium 187 is a constituent of naturally occurring osmium—1.6 per cent. abundance. It is not subject to either export or import control.
The price per gram is approximately £10.
I am not aware that the 187 isotope is available in the UK in a separated form. Any inquiries to discover the quantities of Osmium 187 could be done only at disproportionate cost.