An FCO History Occasional Paper published to commemorate the 60th Anniversary of the announcement of the discovery of the Katyn massacre, on 13 April 1943. This Paper reproduces an earlier 1973 Memorandum on official Foreign Office reaction to Katyn that was written by Rohan Butler, Historical Adviser to the Foreign Secretary. This document was published in April 2003 and uses official FCO documents on Katyn, from the period 1973-2003. Published by Foreign, Commonwealth and Development Office FCDO