	irish oil concern boosts cenergy crg stake bryson oil and gas plc a belfast northern ireland oil company which has said it is considering seeking control of cenergy corp said it raised its stake in the company to shares or pct of the total in a filing with the securities and exchange commission bryson said it bought cenergy common shares on march at eight dlrs each previously it had held shares or pct bryson has request detailed shareholder information from cenergy in case it decided to communicate with shareholders but it said cenergy has made legal challenges to the request reuter 
