This article discusses a case currently pending in the House of Lords regarding whether the UK can extradite a British citizen to the US for financial actions which were not crimes in the UK at the time they were committed. See http://www.ft.com/cms/s/0/67b1cfd0-ee2e-11dc-a5c1-0000779fd2ac,noOfParas=2,emailFormat=plainText,storyType=ultralight,dwp_uuid=fe95602e-e821-11db-b2c3-000b5df10621,print=no,_i_email=y.html