England's Revenue and Customs agency charged Peter Griffin with supplying Libya with machine tools used to manufacture centrifuges for uranium enrichment in collaboration with Pakistan's disgraced nuclear engineer, Abdul Khan.
Khan confessed to secretly sharing Pakistan's nuclear technology with Iran, Libya and North Korea in Jan. 2004.
The charges against Griffin say he "engaged in the proliferation of technology and equipment" used to "help Libya to develop their capability to produce a nuclear weapon," The Sunday Times of London reported.
Griffin admitted supplying machinery to Libya, but claimed his associates misled him about their end-use, the newspaper said.
British authorities never prosecuted Griffin and have not revealed the reasoning behind dropping the charges.