Copyright in a work (being a computer program, sound recording, or film) is not infringed by the rental of that work to any person by an educational establishment or a prescribed library within the meaning of section 50, where—
(a) the educational establishment or prescribed library does not effect the rental of the work for the purposes of making a profit; and
(b) the work that is the subject of the rental has previously been put into circulation with the licence of the copyright owner.