- Welcome to the homepage of SADAssociation The world's longest established support organisation for Seasonal Affective Disorder What is SAD Symptoms Treatment Information Pack Join SADA Press Releases PO Box 989 Steyning BN44 3HG, England SAD Association 2001 Enquiries about these pages (not about SAD) should be addressed to the Webmaster Site produced and maintained by The Ambergate Network ...www.sada.org.uk