Britain has agreed to a prisoner transfer of ex-Bosnian Serb leader Radovan Karadžić, convicted of the Srebrenica genocide, to a UK prison to serve the rest of his sentence, a statement from the British Foreign Office said on Wednesday.Britain has agreed to a prisoner transfer of ex-Bosnian Serb leader Radovan Karadžić, convicted of the Srebrenica genocide, to a UK prison to serve the rest of his sentence, a statement from the British Foreign Office said on Wednesday.