On 17 January 2020 HSE published a revised version of EH40/2005 ‘Workplace exposure limits’. This has been updated in order to implement amendments to the Carcinogens and Mutagens Directive (2004/37/EC) which introduces or revises 13 binding occupational exposure limit values for a number of carcinogenic substances.
Occupational exposure limits are implemented in the UK via the Control of Substances Hazardous to Health (COSHH) Regulations as Workplace Exposure Limits (WELs) via Table 1 of EH40/2005 ‘Workplace exposure limits’ for use with COSHH.
COSHH requires exposure to carcinogenic substances to be reduced to ‘as low as is reasonably practicable’. Follow the link to download document: https://www.hseni.gov.uk/sites/hseni.gov.uk/files/EH40-2005%20%282020%29.pdf