Common space
Approved document O, published by HM Government in 2021, defines common spaces as: ‘Spaces which are used mainly for circulation, e.g. a corridor or lift lobby.’
Approved document F, 2021 edition, defines common space ass: A space where large numbers of people are expected to gather (e.g. a shopping mall or foyer of a cinema or theatre) or which is used mainly for circulation in buildings which do not contain dwellings (e.g. a corridor or lift lobby in an office building). This does not include areas used solely or principally for circulation in buildings containing dwellings, including corridors or lift lobbies in blocks of flats.'
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