The ‘Control of Substances Hazardous to Health Regulations 2002: Approved Code of Practice and Guidance (L 5) (Sixth Edition)’ (HSE):

The ‘control of substances hazardous to health regulations 2002: approved code of practice and guidance (L 5)’ (published by the Health and Safety Executive):

Click http://www.hse.gov.uk/pubns/priced/l5.pdf link to open resource.