www.bsonline.bsi-global.com
British Standards On-line service, with access to BS17799-2, The basis of all good security policies.

www.itsafe.gov.uk
ITsafe is run by a small government team, which looks at information from the National Infrastructure Security Coordination Centre (NISCC), publicly available sources, and international partners for relevant issues.

www.sans.org/resources/policies/
Sample policies from SANS institute. Based on real world examples. Good starting point.