A SENIOR adviser to Gerhard Schröder, the German chancellor, has been accused of passing confidential documents to East Germany in the 1980s which revealed how the British Army and RAF would react to an attack by Soviet-led Warsaw Pact forces.The details were among more than 100 pages of material allegedly given to the East Germans by Karsten Voigt, 63, a former MP who now works for the German foreign ministry as co-ordinator of German-American relations. He spent yesterday at an international security conference attended by Donald Rumsfeld, the US defence secretary. The German magazine Focus claimed this weekend that in...