# The Air Quality Standards Regulations 2010, Paragraph 4


Forecast for the following afternoon, day and days—
(a) the geographical area in which it is expected that an information or alert threshold will be exceeded;
(b) the expected change in pollution, that is, improvement, stabilisation or deterioration, and the reasons for those changes.

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Source: https://www.legislation.gov.uk/uksi/2010/1001/schedule/9/paragraph/4 (the official version)
Page: https://openlegislation.uk/air-quality-standards-regulations-2010/schedule-9/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.