‘Dangerous Substances and Explosive Atmospheres Regulations 2002 – ACOP and Guidance (L 138) (Second Edition)’ (HSE):

‘Dangerous substances and explosive atmospheres regulations 2002 – ACOP and guidance (L 138)’ (published by the Health and Safety Executive):

Click http://www.hse.gov.uk/pubns/priced/l138.pdf link to open resource.