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London Technical Guidance


This technical guidance has been prepared by the Greater London Authority (GLA) to support London boroughs in carrying out their duties under the Environment Act 1995 and connected regulations. It applies only to London’s 32 boroughs (and the City of London).  Air quality in the capital is devolved to the Mayor of London, who has a supervisory role, with powers to intervene and direct local authorities in Greater London under Part IV of the Environment Act 1995. In support of these devolved powers, the Mayor has established a London-specific LAQM system (LLAQM) for the effective and coordinated discharge of their respective responsibilities under
Part IV of the Act.

Current Version


London Specific LLAQM.TG(19)

Hosted on www.london.gov.uk


In March 2019 the London boroughs were consulted on a range of updates and improvements to the LLAQM. Following a successful consultation, the new LLAQM was published in October 2019. These updates were undertaken in order to:

  • Ensure boroughs are taking ambitious action, which is properly co-ordinated at the regional level, and which supports Mayoral objectives including those set out in the London Environment Strategy.
  • Ensure that London boroughs continue to work towards achievement of World Health Organization safe limits for pollutants even when legal limits are met.
  • Update information in the guidance documents to reflect new research, policies, and priorities.
  • Update Cleaner Air Borough Status (a recognition scheme for boroughs that was introduced under the previous Mayor) so that it is transparent and fair, now promotes continual improvement, and clearly aligns with new LLAQM priorities.
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