# The Welfare of Farmed Animals (England) Regulations 2007, Paragraph 7


If laying hens have access to open runs —
(a) there must be several popholes giving direct access to the outer area, at least 35 cm high and 40 cm wide, and extending along the entire length of the building; and in any case, a total opening of 2 m must be available per group of 1,000 hens; and
(b) the open runs must be—
(i) of an area appropriate to the stocking density and to the nature of the ground, in order to prevent any contamination; and
(ii) equipped with shelter from adverse weather conditions and predators and, if necessary, drinking troughs.

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Source: https://www.legislation.gov.uk/ukdsi/2007/9780110773612/schedule/2/paragraph/7 (the official version)
Page: https://openlegislation.uk/draft-welfare-of-farmed-animals-england-regulations-2007/schedule-2/paragraph-7
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.