P118 CEEFAX 118 Sat 13 Feb 22:31/59       FRANCE Six people were killed when a restored World War Two reconnaiuance plane crashed during an air display in Macon. Three of the victims were on the plane - the others were on the ground.  POLAND Mr Lech Walesa, leader of the banned union, Solidarity, has accepted an invitation to an international trade union congress in Australia next month, the first time the union has accepted such an invitation since it was banned. LEBANON Authorities have detained three suspects in connection with an attempt to assassinate President Amen Gemayel bz planting a bomb in a plane. News index 102/202 Newsreel 119/219