The DCSF have produced a toolkit in a CD Rom format which you can order from the Every Child Matters website or email Children Leeds at Children.leeds@leeds.gov.uk.
The Every Child Matters website has a variety of materials on information sharing available in its training section. These include Questions and Answers, Pocket Guide and Case Studies.
The Public Sector Data Sharing: Guidance and the law, although this is quite old now, it will help provide a greater awareness of the law and information sharing.