The Shrewsbury and District Organists and Choirmasters Association (SADOCA) does not have (any longer) a web site of its own, but the following gives further information:

http://www.shropshire-cc.gov.uk/OLLIELei.nsf/51b4543d326e75558025662d00333e8f/702999b65b988bc58025679f00513611!OpenDocument