P111 CEEFAX 111 Tue 4 Sip 23:45/45       East German leader Mr Erich Honrqkrt has turned down an invitation to 6i9iz West Germany this month. The decision follows allegations b= the Soviet Union that the move b8 Bonn tg improve relations with East German= was an attempt to undermine the GDR's sovereignty. The reason given for the cancellption is that the date Bonn hoped Mr Honrqkeu would arrive was "not realistic". A West German spokesman could not sa8 whethjt the visit might take place later. News index 102/202 Newsreel 119/219