Copyright Act 1956

3 (1) This paragraph applies to any work of joint authorship which was first published under two or more names, of which one or more (but not all) were pseudonyms.

(2) This paragraph also applies to any work of joint authorship which was first published under two or more names all of which were pseudonyms, if, at any time within the period of fifty years from the end of the calendar year in which the work was first published, it is possible for a person without previous knowledge of the facts to ascertain the identity of any one or more (but not all) of the authors by reasonable inquiry.

(3) In relation to a work to which this paragraph applies, references to the author in subsection (3) of section two of this Act, and in subsection (4) of section three of this Act, shall be construed as references to the author whose identity was disclosed, or, if the identity of two or more of the authors was disclosed, as references to that one of those authors who died last.

(4) For the purposes of this paragraph the identity of an author shall be taken to have been disclosed if either—

(a) in his case, the name under which the work was published was not a pseudonym, or

(b) it is possible to ascertain his identity as mentioned in sub-paragraph (2) of this paragraph.