A frequent problem is that the SI number isn’t quoted, making them slightly harder to find.
OPSI site covers all jurisdictions, Acts & SI’s. Also legislation in original and revised format, and explanatory notes for some more recent acts in original form. SLD quite clunky! Some revisions since 2002 not yet incorporated into the database – must be checked separately.
Sources of legal information Maria Mawson, University of Sheffield Pete Smith, Sheffield Hallam University SINTO Legal Information Seminar 8/4/10