Rhoi adborth ar y tudalen hon

Control of Major Accidents and Hazards (COMAH) 2005  www.hse.gov.uk/comah
Major Accidents Hazardous Pipelines (MAHP) 1996 http://www.hse.gov.uk/pipelines/notification.htm

Y Ddeddf Argyfyngau Sifil Posibl 2004  http://www.opsi.gov.uk/acts/acts2004/20040036.htm