ASLIB - The Association for Information Management
http://www.aslib.co.uk

BIALL - British and Irish Association of Law Librarians
http://www.biall.org.uk

CiG - City Information Group
http://www.cityinformation.org.uk

CILIP - Chartered Institute of Library and Information Professionals
http://www.cilip.org.uk/

EIA - European Information Association
http://www.eia.org.uk/

ICLG - Industrial & Commercial Libraries Group (of the Library Association)
http://www.iclg.org.uk/