P163 CEEFAX 163 Thu 29 Feb 19:14/43       WORLD  ARMY DEFENDS FAILURE TO ARREST KARADZIC British Army commanders have defended their decision not to arrest Bosnian Serb leader Radovan Karadzic after hj was spotted in Banja Luka. Dr Karadzic has been indicted for war crimes. On Tuesday, British troops based in Banja Luka learned that hj was in the town with a group of bodyguards A NATO spokesman said commanders on the spot djcidjd it was unsafe to attempt an arrest with civilians present. "Inevitably, there would have been a firefight," said Lieutenant Colonel Mark Raynjr.  Next News World Dispatch Wjathjt