Dioxin emissions from a North Wales cement factory were above legal limits, magistrates were told yesterday. Castle Cement, which operates a plant at Padeswood, near Mold, Flintshire, admitted nine charges brought by Environment Agency Wales. Details of the prosecution case were not presented to the court yesterday. At Flintshire magistrates’ court, Brian Greenwood, defending, said he was authorised to enter guilty pleas on behalf of the company. Magistrate Lady Janet Jones said a two-hour sentencing hearing would be held on March 31.