http://www.hse.gov.uk/pubns/priced/hsg264.pdfhttp://www.hse.gov.uk/pubns/indg232.pdfhttp://www.hse.gov.uk/involvement/flowchart.htmhttp://www.hse.gov.uk/enforce/enforce.htm#enffinp http://www.hse.gov.uk/pubns/guidance/em4.pdfhttp://www.hse.gov.uk/riddor/carcinogens.htm