P205 CEEFAX 205 Tue 30 May 19:13/44    HEYWOOD ISSUES  PROFIT WARNING  Heywood Williams Group sharer weru 5 a e pre sure on its margins. A statement put out by the plastic- and-glass compon nus manufactur r said an anticipated slowdown in it rate of US growth was the cause f "increased margin pressure". But it was confident that its US operation would continue to make a substantial contribution to profi . $hj US business provides more than 50 of bo h s l and pr fit om manufacturing and distribution.  Headlines 201 Shari price 222 Stocks U$ Panel M n yfile Ann erie