Some useful links:
ICON - The Institute of Conservation is the professional body for conservators in the UK and is also a source of information about finding and working with a conservator.
Museums Galleries Scotland - the lead body for museums in Scotland and a source of much useful advice and guidance including Conservation Advice Sheets in various subjects.
CollectionsLink - an excellent source of advice and information about the management and care of collections, whether in museums or privately held.
ReCollections - a very comprehensive guide to the management and care of collections provided by the Heritage Council of Australia