Below are some useful address, where the organization is represented on the web I have linked the relevant page, to ensure any contact information is current and correct.
The *only* official fan club. Address
Kate Bush Club P.O. Box 120 Welling Kent DA16 3DS England.
The British unofficial fanzine WWW
The German unofficial fanzine WWW
Irgendwo In Der Tiefe
The Italian unofficial fanzine WWW
The Italian Kate Bush Fanzine