Some facts. Self-publication is not publication in the conventional sense of the word - as any independent publisher will tell you. My DVDs are self-publications - and I'm under no obligation to send a copy to the 6 Legal Deposit Libraries in the UK. These libraries are:

# Bodleian Library, Oxford
# Cambridge University Library
# National Library of Scotland
# Library of Trinity College Dublin
# National Library of Wales
# British Library

Libraries do not issue ISBNs. Whether the Legal Deposit libraries you send your stuff to actually retained them or not is another matter. You're only obliged to send 6 copies of your work to the LD Libraries if you actually print off multiple copies to sell. Vanity publishing doesn't count if they're not commercially for sale.

Will (in my capacity as a University Librarian)