# Copyright Act 1956, Paragraph 10


(1) Notwithstanding anything in section eleven, or in the Third Schedule to this Act, copyright shall not subsist by virtue of Part I of this Act in any work of joint authorship first published before the commencement of section eleven, if the period of copyright had expired before the commencement of that section.
(2) In this paragraph “the period of copyright” means whichever is the longer of the following periods, that is to say,—
(a) the life of the author who died first and a term of fifty years after his death, and
(b) the life of the author who died last.

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Source: https://www.legislation.gov.uk/ukpga/Eliz2/4-5/74/schedule/SEVENTH/paragraph/10 (the official version)
Page: https://openlegislation.uk/copyright-act-1956/schedule-SEVENTH/paragraph-10
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.