S1: Deposit of publications
(1) A person who publishes in the United Kingdom a work to which this Act applies must at his own expense deliver a copy of it to an address specified (generally or in a particular case) by any deposit library entitled to delivery under this section.
(4) In the case of a work published in a medium other than print, this Act applies to a work of a prescribed description.
(5) A prescribed description may not include works consisting only of-
(a) a sound recording or film or both, or(6) Subject to section 6(2)(h), the obligation under subsection (1) is to deliver a copy of the work in the medium in which it is published.
(b) such material and other material which is merely incidental to it.
S6: Regulations: deposit of non-print publications
(1) The Secretary of State may make regulations supplementing sections 1 and 2 as they apply to works published in media other than print.
(2) Regulations under this section may in particular-
(a) make provision about the time at which or the circumstances in which any deposit library becomes or ceases to be entitled to delivery under section 1;
(b) require the person mentioned in section 1(1) to deliver, with the copy of the work, a copy of any computer program and any information necessary in order to access the work, and a copy of any manual and other material that accompanies the work and is made available to the public;
(c) require delivery within a time prescribed by reference to publication or another event;
(d) permit or require delivery by electronic means;
(e) where a work is produced for publication in copies of differing quality, specify the quality of copies to be delivered;
(f) where a work is published or made available to the public in different formats, provide for the format in which any copy is to be delivered to be determined in accordance with requirements specified (generally or in a particular case) by the deposit libraries or any of them;
(g) make provision as to the circumstances in which works published on line are or are not to be treated as published in the United Kingdom;
(h) specify the medium in which a copy of a work published on line is to be delivered.
I have no idea whether the Secretary of State intends to make online personal journals subject to the Act, but there seems no reason why he shouldn't. The mere fact that they're written material made available to the public (one could write to the Editor and obtain copies) was enough to bring printed 'zines under control by the previous Act. Since anyone with 'net access can read (most of) my LJ, it's (at least technically, and technicalities can count in these things) published. Now, would it need an ISBN or an ISSN? :)
I intend to find out what current government thinking is on this matter.
Library folk (misstemperance et al.), what have you heard about this?